Snorkling
and hanging out at the beach.
A large part of the Osa Peninsula is composed of Corcovado National Park that boasts incredible biodiversity with close to 400 species of birds, 140 mammals and 500 species of trees. There are also 239 varieties of snakes (no pictures) 
We stayed in comfortable cabanas 20 paces from the surf amid gardens of glorious tropical flowers. Hammocks are strategically laced between palm trees. Just right for a birthday afternoon.

This turned out to be a great spot. It is run by a couple originally from Republic, Washington (south of Grand Forks). The road behind the buildings was an adventure. I had to walk through a flock of vultures to get to the corner store. They don't pay much attention to living things! The things you do for beer!