12 of the Cutest Sloths You've Ever Seen!Don't call 'em lazy: These creatures at Costa Rica's Aviarios Sloth Sanctuary are working it!


The best part of running the sanctuary is seeing injured or sick sloths returned to health, says Avey-Arroyo. The "Slothpital" treats lots of vehicle and powerline injuries, including Leena's – horrifically, she was hit by a car, then set on fire. Luckily, she made it to the sanctuary, where she fully recovered and has a permanent home.