One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

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

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Hans Christian Andersen for the postmodern world.

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

The language and heritage of a nearly forgotten culture can still be explored in this Southern enclave.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

Former utopian colony based on the belief that the universe exists in a hollow sphere.

A riverside park built around the ruins of a massive dam that collapsed in 1909.

A French-Colonial era collection of taxidermy and wet specimens, secreted away in the National University of Hanoi.

Walk through a clothing store, across a courtyard, and up several flights of stairs for delicious coffee with a side of beautiful views.

For those going through a life transition, a place to leave behind a piece of your former self.

Every drop of D.C. tap water flows through this old waterworks.

A clone of a cloned tree that was so important it allegedly had its own guards.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.