Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

This unique bridge physically lifts a piece of the road into the air to let boats pass by.

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

Back in 1952, you could get a mushroom cloud chaser with your atomic cocktail.

A little known Colombian theme park of giant curiosities.

A display of magnificent stained glass windows is the first exhibit of its kind.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

A museum documents the development of the invention that tamed the Wild West.

This museum holds not just a world class collection of firefighting artifacts and gear but even the region's first fire station itself.

A museum in south England celebrates the amphibious vehicles that cruise on a cushion of air.

A temple to modernity, tucked away amid Barcelona's more well known museums.

A wonderful and easily overlooked museum tucked in Ohio's Burke Lakefront Airport.

A fascinating little museum dedicated to the thousands of chemical substances concealed in our food.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

A self-proclaimed libertarian micro-state on a tiny bit of disputed territory between Serbia and Croatia.

America's only nuclear missile silo open to the public.

An ongoing medieval tradition of communal pig husbandry is honored with a handsome granite sculpture.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.