Climb right into the heart of this colorful Iceland volcano.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Possibly the world's smallest museum is home to one exhibit that sheds light on the capital city's dark criminal history.

A vintage penny arcade hidden in the back of a fun fair-themed bar.

This concept building is the UK's first attempt at making a permanent structure of nothing but trash.

To literally keep their waste out of their own backyards, the citizens of this English city built an impressive sewer system that is still in use today.

A taste of Middle Earth, in the middle of the Bayou City.

Eat your Big Mac in a DC-3.

All that's left of the quintessential "cabin in the woods."

These small, triangular, colorful houses are a staple of Madeira Island.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

Astonishing rock formations dot the Brimham Moor landscape.

The oldest candy store in the world has been selling traditional sweets since 1827.

The only thing sweeter than the potatoes is the canine proprietor of this roadside stall.

The oldest surviving presidential residence in the United States.

An English artist has turned an unassuming ex-council house into a time-lost house of mystery.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

The cathedral of a controversial, conservative, schismatic sect that declared the Catholic Church heretical and founded its own succession of popes.

A clerical error gave rise to this imaginary micronation in the southwestern corner of Estonia.

A magnificent menagerie of oddities, including taxidermy cryptids.