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

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

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

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

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Go through the looking glass in Tokyo's Wonderland-themed shop.

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.

A beautiful bamboo trail tucked in this famous Japanese Shrine.

A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest." 

1,001 carved statues of the Buddhist God of Mercy, each with a unique face.

The magical, mossy forest that inspired Princess Mononoke.

Every autumn, this hillside is ablaze with red summer cypress.

Once the most densely populated place in the world, this island is now a ghost town.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

On Japan's Tashirojima Island, cats are king.

An exquisite tunnel of cascading flowers.

A once-luxurious, now abandoned hotel in the Italian Alps.

A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Bell tower juts out from a village buried under a lake.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Italian cave with exceptional acoustics and an unsavory history.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.