This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

Liechtenstein's royal family calls this medieval alpine castle home.

A historic observatory precariously perched at the "Top of Europe."

The second-highest train station in Europe.

This groundbreaking 16th-century map is known as "America's birth certificate."

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Once an imperial lake garden, anyone can now visit this city park.

With former lives as a bomb shelter and government parking lot, this shop is one of China’s most extraordinary locales for book-lovers.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

Memorial to the father of the Republic of China.

An open-air museum exhibiting a total of 52 century-old buildings, recreating Hokkaido’s “pioneer village.”

These wondrously illuminated caverns extend under the mountains of the Fukushima Prefecture.

The Buddhist temples of Yamadera, built into a mountain side, feature a viewing deck with sweeping views.

These tiny pine-covered islands have inspired art and poetry for centuries.

Giant animal sculptures are created with the rice straw leftover from the fall harvest each year.

This battleship of a building was designed by a famed "mad architect."

Not quite the menace it once was, this monster still has some chops.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An 18th-century townhouse that once hosted guests of the president.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.