This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

Cat art as far as the eye can see.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

Exact replica of the ancient monument, but much, much lighter.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

A tribute to the "toughest woman on the Texas frontier," who survived a famous battle and five husbands.

Free public park and gardens filled with peacocks and peahens.

A grove of colossal man-made flowers built to collect the sun's rays.

This failed condo development was reborn as a street art hub.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

An emerald-green grotto just a short trip from Austin.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

This former insane asylum now holds a pathological anatomy museum.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

King Ludwig I's collection of beautiful women.

Go surfing on this urban wave, "hacked" by local surfers.

The footprint of a frustrated devil in Munich's Cathedral.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.