I read a story recently about an underwater mailbox off the coast of Sasumi, Japan, the only one in the world. That's pretty cool and something I'd like to see one day if I weren't such a poor swimmer.
If you ever go to Disneyland, you can see Monstro, the giant whale from Pinocchio. When I was little, Monstro terrified me. His eye! His eye MOVED! I swore he was alive, and I'd be in tears as my dad carried me closer to him. I probably tried to claw my way out of his arms like a cat being dragged to a bath. There's a little boat that you can ride that takes you through Monstro's gaping maw to Storybook Land, which to this day I have never done.