The bare Isla de Lobos (4.7 sq km) takes its name from the lobos marinos (sea wolves) that once lived there. They were, in fact, focas monje (monk seals), which disappeared in the 15th century thanks to a series of hungry mariners landing on the barren island's shores. The good news is that attempts are being made to reintroduce the seals to the island.
It is well worth taking a trip to the islet from Corralejo. Once you’ve disembarked you can go for a short walk to explore the island, including the pleasant beach to the north of the pier, climb the island's mountain or visit the lighthouse. Hiking around the island takes around an hour – stick to the marked paths.