Nature-first travel is booming in 2026. Interest in the search term “greenest city in the world” has surged by over 9,900% in the past year, according to Google Trends. Travellers are seeking destinations that blend city exploration with outdoor relaxation in open green spaces. With that being said, travel experts at Iglu Cruise have created a Green City Index to identify the top nature-rich cities in the world for travel in 2026.
To create the Green City Index, Iglu Cruise researched three key factors. The percentage of greenery in each city, the share of accessible public green space, and air quality, to ensure these areas support physical health, too.
Let’s take a look at the top 10 cities where nature and urban life combine for the best nature-focused city breaks.
1. Oslo, Norway
Green Score: 77.3
Oslo ranks first on the Green City Index, boasting high air quality and the highest percentage of green spaces and public parks. As a result, 95% of residents live within a 300-metre walk of a green area, making Oslo one of Europe’s most walkable capitals.
Visitors can explore “pocket parks”, an initiative developed through community-led efforts that transform old parking spaces into green areas in built-up cities. There are also well-known sites like the Royal Palace Park and Vigeland Park, the largest sculpture park in the world created by a single artist. A 20-minute metro ride from the city centre takes you to Oslomarka forest and the trails around Sognsvann Lake.
Oslo also features the world’s first “bee highway”, a corridor of flowers and bee hotels running across the city’s streets. This combination gives tourists a unique experience, with the stunning Norwegian nature just minutes away.
2. Vilnius, Lithuania
Green Score: 72.3
Vilnius ranks as the second-greenest city and officially holds the title of European Green Capital for 2025 by the European Commission. This recognition highlights the city’s commitment to sustainability and its high air quality. With 61% of its territory dedicated to green space and a dense forest canopy covering nearly half the city, Vilnius is one of the few European capitals where hot air balloons are permitted to drift over the UNESCO-listed city centre, offering a rare aerial perspective of this “city in a forest.”
Visitors can immerse themselves in this landscape by exploring the Bernardine Garden in the heart of the Old Town, strolling through Vingis Park, or hiking the ridges of Pavilniai Regional Park. The Lithuanian capital boasts over 1,500 km of walking trails, including a signature 100 km loop around the city, and an ever-expanding 140 km network of bike paths. This blend of city and scenery serves as a blueprint for the capital’s goal to become fully climate-neutral by 2030.
3. Helsinki, Finland
Green Score: 60.3
Helsinki ranks as the third greenest city, celebrated for its “wild urbanism” and clean air. It was awarded the title of the world’s most sustainable travel destination in the Global Destination Sustainability Index for 2024 and 2025, making it an ideal destination for health-conscious travellers. The city features about 46% of its area as green space, including Kaivospuisto (Central Park), which is a 10km stretch of forest starting from the city centre.
For plant lovers, Kumpula Botanic Garden and Haaga Rhododendron Park are must-visits, especially in June when the rhododendrons bloom. Helsinki boasts a Baltic Sea coastline and offers an impressive 340sqm of green space per resident. If you’re looking to explore beyond the city, Nuuksio National Park is easily reachable by public transport and offers lakes and forests perfect for hiking.
4. Vienna, Austria
Green Score: 59.3
Vienna ranks fourth on the Green City Index, with over 50% of the city designated as green space. This landscape includes everything from historic gardens to the Vienna Woods, a UNESCO Biosphere Reserve located on the city’s western edge. The Vienna Woods features a network of walking and hiking paths that are easily accessible via the city’s public transport.
For visitors, the city provides a diverse range of outdoor experiences, from the manicured gardens of Schönbrunn Palace to the wilder, wooded hills of Leopoldsberg. Travellers can explore the 21-kilometre Danube Island for cycling and swimming or hike through the vineyards of Döbling for panoramic views of the Danube River. By integrating its heritage with a commitment to environmental preservation, Vienna demonstrates how a historic capital can function as a modern, living sanctuary.
5. Canberra, Australia
Green Score: 58.7
Canberra, often referred to as the “Bush Capital,” ranks as the fifth-most-nature-immersive city and holds one of the highest rates of urban green space per capita globally. Purpose-built in 1913 to blend urban living with the Australian landscape, the city preserves 45% of its area as protected national parks and nature reserves. This unique design ensures that every resident remains connected to the wilderness, even within the heart of the capital.
For visitors, Canberra’s “Garden City” layout offers an immersive outdoor experience. Travellers can explore the National Arboretum, home to over 100 different forests featuring thousands of rare trees, and take in panoramic views from Dairy Farmers Hill. The city is centred on Lake Burley Griffin, a scenic waterfront path perfect for cycling and lakeside picnics, linking Lennox Gardens to the Black Mountain Peninsula. Powered by 100% renewable electricity, Canberra stands as one of the world’s most sustainable capitals, where a sophisticated city experience is always just steps away from the wild Australian bush.
6. Sydney, Australia
Green Score: 58.3
Sydney ranks sixth among the world’s greenest cities, with 46% of public park space, demonstrating how a global hub can integrate nature. Through the “Rewilding Sydney” initiative, the city has already surpassed 173,000 native plantings to restore biodiversity, supporting a vision where every resident lives within a ten-minute walk of a park and the iconic harbour is linked by a vast network of green walkways and cycle paths.
For visitors, Sydney provides an immersive outdoor experience that starts at the Royal Botanic Garden, adjacent to the Opera House. The “green lung” of Centennial Parklands offers 890 acres of lush trails and lakes, while Hyde Park, Australia’s oldest park, provides a shaded retreat in the heart of the central business district. Travellers can also explore Barangaroo Reserve, a former industrial site transformed into an area of 75,000 native plants, and the tranquil Chinese Garden of Friendship in Darling Harbour.
7. Stockholm, Sweden
Green Score: 55.7
Stockholm ranks seventh among the world’s greenest cities, defined by a unique “one-third” layout: one-third water, one-third green space, and one-third urban area. As the first European Green Capital in 2010, the city offers one of the highest ratios of green space per capita in the world, ensuring almost every resident lives within a few minutes walk of nature. This landscape is centred on the Royal National City Park, the world’s first urban national park, which stretches six miles through the heart of the city, merging old forests with crystal-clear waterways.
For visitors, Djurgården Island serves as a natural playground and home to Rosendals Trädgård, a natural haven. Here, travellers can dine in glass greenhouses or relax in apple orchards that have grown since the 1860s. Hagaparken features English-style landscaped gardens, century-old trees and lakes surrounding the royal Haga Palace. From its manicured gardens to its rugged forest trails, Stockholm provides a sophisticated urban experience where nature is an essential, everyday luxury.
8. Singapore
Green Score: 53.3
Singapore ranks eighth among the top ten greenest cities globally, pioneering a “nature-first” model that features over 300 acres of Skyrise Greenery. Through the OneMillionTrees movement, which has planted over 700,000 trees toward its 2030 goal, the city ensures that 95% of households are within a ten-minute walk of a park. This design provides an average of 66sqm of green space per resident, even in one of the world’s most densely populated hubs.
Visitors can explore a 370km network of interconnected parks, linking the iconic “Supertrees” of Gardens by the Bay with the UNESCO-listed Botanic Gardens. From the tropical rainforests of Sentosa Island to the vertical gardens that scale its skyscrapers, Singapore has evolved beyond a “Garden City” into a global model for urban biodiversity. By incorporating nature into every level of its architecture, Singapore remains a leading contender for the title of the world’s greenest city.
9. Reading, UK
Green Score: 51.7
Reading ranks ninth in the top global green cities and is recognised as the UK’s greenest destination. With 35% of its area dedicated to public green space, the city is defined by the “Rivers and Parks” initiative, which connects the Thames and Kennet rivers directly to the town centre. The city’s central green space, the Abbey Quarter, blends historic ruins with the manicured landscapes of Forbury Gardens.
For visitors, Reading offers a landscape that transitions from the high-tech business hubs to the tranquil Christchurch Meadows and Caversham Court Gardens. The city’s outskirts feature the 80-acre Prospect Park, famous for its hilltop views, and the cycling circuits of Palmer Park. Supported by world-leading sustainability research from the University of Reading, the city has achieved a 57% reduction in carbon emissions, successfully evolving into a model for a nature-rich, low-carbon urban economy.
10. Munich, Germany
Green Score: 50.7
Munich ranks tenth among the world’s greenest destinations and is recognised as the most walkable city on the planet. Its famous English Garden is larger than New York’s Central Park, while the “Park Miles” connects the urban centre to a 70-kilometre protected green belt. With a commitment to becoming climate-neutral by 2035, Munich leads the way in combining metropolitan living with environmental health.
Visitors to Munich can enjoy a variety of parks and recreational areas. The Olympiapark, created for the 1972 Games, covers 395 acres of hills and lakes, while the Nymphenburg Palace Park is the city’s second-largest green space and offers a grand Baroque setting. Nature lovers can explore global plant species at the nearby Botanical Garden or hike up Luitpold Hill in Luitpoldpark for panoramic views of the city and the Alps. From the famous Eisbach surfing wave in the English Garden to its world-class public transportation, Munich demonstrates how a modern economic centre can remain deeply connected to nature.
Methodology by Iglu Cruise:
To create our Top 10 Nature-First Cities ranking, we built a Green City Index using data collected from public sources. We gave each of these three areas an equal weight of 33.3% to find the final score:
- Overall Greenery: We used city vegetation percentages provided by HUGSI 2025/2026, which uses satellites to measure trees and grass across urban areas.
- Public Parks: We used the percentage of land officially set aside for public use, based on data from the World Cities Culture Forum (WCCF) and UN-Habitat.
- Clean Air: We used the official air quality ratings from IQAir and the European Environment Agency. To make this fair, we gave more points to cities with the cleanest air, for example, a city with “Elite” air quality gets the most points toward its final score.
By looking at all three pieces of data together, we found the cities that aren’t just green on a map, but have plenty of open parkland and clean, healthy air to breathe.
Images courtesy of unsplash.com and pexels.com.
