Lorraine Williamson
Sustainable tourism is taking on an increasingly prominent role in Spain. As one of the world’s most popular travel destinations, the country is investing more in eco-friendly initiatives. In 2025, National Geographic highlights two Spanish islands in the category of Best Sustainable Destination.
These islands are recognised as the most sustainable in Spain, thanks to their commitment to environmentally responsible tourism and the preservation of their unique natural beauty.
A sustainable jewel in the Balearic Islands
The first island is renowned for its paradise-like beaches with white sand and turquoise waters. What makes this destination special is its dedication to sustainable tourism. The island government promotes cycling as the ideal means of transportation. Visitors can ride along scenic coastlines, discover hidden coves, and enjoy panoramic views from numerous lookout points.
Additionally, the plant species Posidonia Oceanica, which grows in the waters around this island, plays a crucial role in maintaining water quality and biodiversity. This seagrass, listed as a UNESCO World Heritage Site, helps the beaches retain their iconic crystal-clear blue colour. The island in question is Formentera, a small gem of the Balearic Islands. It is perfect for those seeking unspoiled nature, relaxation, and an authentic Mediterranean atmosphere.
Formentera has no airport of its own, making it accessible only by boat. Most visitors fly to Ibiza and then take a ferry (approximately 30-45 minutes). This likely contributes to the island’s tranquility, in contrast to its larger counterparts, Mallorca and Ibiza.
A natural paradise in the Canary Islands
The second island stands out for its breathtaking landscapes and untouched nature. It is characterised by deep ravines, rugged mountains, and a unique ecosystem of laurel forests in Garajonay National Park, which has been recognised as a UNESCO World Heritage Site.
We are talking about La Gomera. With its extensive network of hiking trails, this island is a paradise for nature lovers and hikers. The routes lead through spectacular viewpoints, dense forests, and stunning cliffs. Additionally, the traditional silbo gomero, a whistling language once used by shepherds and islanders to communicate across valleys, has been recognised as Intangible Cultural Heritage by UNESCO.
Like Formentera, La Gomera has no major airport. The island can be reached by ferry from Tenerife, with a fast ferry crossing in about 50 minutes. It is the least touristy of the Canary Islands and enjoys a pleasant climate all year round.
Since 2012, La Gomera has held the status of a Biosphere Reserve, underscoring the island’s commitment to sustainability. This recognition highlights the balance between economic development and nature conservation, with the goal of ensuring a sustainable future for the island.
Sustainable tourism in Spain
In addition to these two islands, the Spanish city of Vitoria-Gasteiz is also competing in the selection of Best Sustainable Destination 2025, thanks in part to its extensive cycling network and the Anillo Verde (Green Ring) that surrounds the city. As Spain continues to invest in sustainable travel, these destinations stand as prime examples of eco-friendly tourism that balances visitor enjoyment with environmental responsibility.