The spot where the namesake of the Douglas fir met his mysterious end on a Hawaiian volcano.

A luxuriant botanical garden below sea level.

A showcase of engineering might that was also symbolic of westward expansion.

The oldest house in the capital of Silicon Valley.

This fully intact Neoclassical-Greek Revival style firehouse operated until 1938.

The first all glass and steel residence in the United States.

A one-of-a-kind collection of a unique medium.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A psychedelic labyrinth on the San Francisco bay.

A colony of Mexican free-tailed bats live under the bridge and take flight at sundown all summer long.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

Collection of vintage trailers double as hotel rooms.

Joe Minter is only doing the work of God in his yard, he says.

These ruins are all that's left of the former Alabama State Capitol.

The birthplace of this Gilded Age celebrity, opera singer, suffragette, and shipwreck survivor has been turned into a museum celebrating her fascinating life.

This nature mural exists to protect the surrounding environment and its own canvas from destruction.

Located in the historic home of a newspaper publisher, this museum is dedicated to the Freedom of Speech.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

This massive, ancient stone was disassembled and then put back together again.

A son-and-daughter meat market, hawked by mom and dad.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

For fans of the stained glass art of Irish illustrator Harry Clarke, this church is the place to be.

A stunning Victorian abbey and walled garden on a lakefront.

Wander among the abandoned ruins of this once-powerful medieval town.