This mausoleum is the final resting place of one of St. Louis's richest and most tragic families.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

This abandoned Victorian-style house was built in 1884.

One of the oldest living oak trees in the Southeast.

An abandoned village, frozen in time by the threat of a landslide.

One of the most valuable palace-garden complexes in the eastern borderlands—and one of the most haunted.

A remarkably opulent mansion with a tragic history.

A mapping error in the 19th century made loggers think this section of the forest was underwater.

Toss a Frisbee through the ruins of this Colorado gold mining town.

Obelisks and stone pineapples in the Irish countryside.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

One of Ireland's most infamous prisons for rebels including men, women and children.

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

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

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

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

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.

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