This unique rock formation is quite the local celebrity, although one day it may come crashing down.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

A micronation on an islet along the coast of a Portuguese island.

Crafted from ocean litter, this sculpture highlights the ills of overconsumption.

A shrine-like museum entirely dedicated to soccer superstar Cristiano Ronaldo.

A lush oasis full of vibrant plants and striking geometric displays.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

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

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

A non-stop elevator ride in Vienna's city hall.

Solitary monument dedicated to the beauty of nature.

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

A perfectly circular stronghold constructed in the 10th century is now a nucleus of Viking culture housing a museum, village, and reenactment of an epic Viking battle.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

These pastel-colored homes were built when the island of Macau was a Portuguese colony.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

The world's most elegant power lines.