At least that’s what it looks like. As the sun set, the beach was a flat plain. Now look at it. They have been busy in their mysterious ways, and now there is no sign of them. Crabs, and particularly hermit crabs, are underrated as an Osa beach attraction, and if there is a more relaxing way to spend an afternoon than with a spot of hermit crab racing (obstacles optional), followed by a cold beer in a sunny, sandy-bottomed, ocean view rockpool, and then with a trashy novel in a wide hammock, I haven’t discovered it yet.