They look like the Canary Islands, but these volcanic islets are located in the Mediterranean and are one of the most unknown areas in all of Castellón. The Columbretes Islands are an archipelago off Alcossebre, with four protected islands where only a few experts and watchers live, offering the optimal night sky to view the 2026 solar eclipse.
What to see in the Columbretes Islands, Castellón
The Columbretes Islands are a natural park made up of four islets: La Grossa, La Ferrera, Foradada and Carallot. Currently, La Grossa is the only one that is allowed to access, to protect the seabed and the endemic species that live isolated in these rocks, such as the sea turtle or lizards.
Its seabed is full of natural banks, kelp forests and red coral reefs, making it a paradise for diving lovers. Of course, after booking the boat that takes you to its waters for about 165 euros. Setting foot on land in La Grossa is allowed, whether with your own boat or with a rental company, always complying with the regulations of the Generalitat Valenciana.
The walk must be accompanied by Reserve staff, there is a limit for visitors and eating on the ground is not allowed, to protect its habitat. There are no shadows either, so it is recommended to bring sunscreen, water and a hat.
Where to eat cheap and delicious in the Columbretes Islands, Castellón
In this case, the islands are virgin and the only building they have is a lighthouse, so there is no place to eat or drink. Food is also not allowed on land, so we recommend taking a sandwich for the boat.
Where to see the 2026 solar eclipse on the Columbretes Islands, Castellón
Although all the boats leave the islands at four in the afternoon, during August 12, 2026 and on the occasion of the solar eclipse, boats will leave and anchor in their seas, allowing you to see the total black sun for 1 minute and 34 seconds in the waters of the Columbretes Islands, without disembarking. There is no light pollution or visual obstructions there, making it one of the best places to see it, according to experts. For this reason, the excursions will be very popular and must be booked in advance.
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