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.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

The exact whereabouts of this surreal cabinet of curiosities are rarely the same place twice.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

A priceless collection of the Nation's cryptologic history.

Bizarre Cavern.

This free, take-a-book shop seems like a trick but isn't.

Eighteen miniature death-scene dioramas.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

The only town in the world with two exclamation points in its name.

A scenic overlook of a pit mine hundreds of meters deep filled with blue water.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

Train tunnel running underneath Quebec City.

World's largest collection of serial killer artwork and other macabre exhibits.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

An island filled with hundreds of hanging, decomposing, decapitated dolls.