Beautiful little cactus island in the middle of the Salar de Uyuni. There is a small hiking trail on it. The price for the hiking trail is (30 BOB). There is also accommodation and toilets. For day guests, use of the toilet is free with the ticket.
Definitely worth the stop. We were there in 2006 so things may have changed since. We stayed overnight in the free cyclists refuge. After cycling in from Llica, I ate two Mondo burgers and later learned that electricity (and therefore refrigeration) on the island is intermittent. The result was violent vomiting in the middle of the night. Prior to that, the island was a great and experiencing sunset there was pretty magical.