San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

Explore more than 130,000 new and used books in the "world's largest outdoor bookstore."

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

A wedding chapel, vintage clothing shop, and bar all under one roof.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.