Northern Ireland's Brobdingnagian stepping stones.

A memorial to a goat culled during a foot and mouth disease outbreak guards a series of fantastical caves.

This stone harbor was key to Carnlough's limestone industry.

This "floating railway" is one of the world's oldest monorail systems.

Take a walk in a recreation of ancient Rome.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Electrical curiosity museum housed in an old transformer station.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Budapest's Communist-era statues, banished to the suburbs.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

A collection of objects supposedly singed by the hands of souls in purgatory.

A "miracle" that seems to produce more holy fistfights than holy revelations.

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

On holy holidays, Israel's second president used this room atop Mount Zion as a refuge to read the Torah.

The only quarter of the Old City not dedicated to a major world religion.

The tallest waterfall in the Judean Desert is named for its connection to a biblical figure.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

An archeological treasure trove stumbled upon by a couple of children.

This 19th-century fountain's namesake animal isn't what you think it is.