This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

The ancient tomb acts as a calendar that keeps perfect time.

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

A mysterious Neolithic tomb is perched along the edge of a modern golf course.

The supreme shrine of the state.

The site where the Emperor of Korea performed the long-forbidden "rite of heaven" to demonstrate his absolute sovereignty.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

This psychedelic tourist trap is a leisurely descent into madness.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

World's largest barrel containing an inn.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

This open-air reconstruction of an Old West town, a cross between a theme park and a museum, provides an immersive historical experience.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

Underneath one of the region's most historic roads lies the home of Plato's successor.

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