Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

This freshwater spring fills with 10,000 gallons of water per minute.

Impossibly life-like natural history models created out of glass by a father and son.

This massive redwood tree has a hole in the base big enough to drive through.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A stone face watches over the river.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

These azure waters were thought to lead to the Mayan Underworld.

Homemade outdoor church and sculpture garden decorated with glass shards.

Bizarre Hindu and Buddhist sculpture park.

Natural arch offers panoramic views of Yangshuo's karst hills.

Macabre astrological automaton clock dating to the late 1400s.

A museum dedicated to the exploring past, present, and future innovations.

The self-made house sculpture of an outsider artist who named himself "Chief Rolling Thunder."

One of the few surviving "Wigwam"-themed motels.

The only castle in North America to ever house European sovereigns.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

An eccentric folk art landmark made out of discarded bottles by an inspired "grandma."

An 80-year-old house built out of newspapers.

A layered tribute to the work of mosaicist Isaiah Zagar.

Huge masonic hall in Philadelphia with lavishly themed rooms.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A cluttered and astounding collection of antiquities and curiosities.

A museum of unusual collections, mini-towns, and a half-dog, half-alligator.