The world's largest secondhand book market is a haven for bibliophiles and bargain hunters.

A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

A cozy bookstore is tucked within an old gold mine shaft beneath the cafe and ice cream shop.

One of the notorious Soviet leader Joseph Stalin's many summer retreats.

The blowhole bursts spectacularly right next to the buildings in a medieval seaside town.

A house turned museum is the real-life "home" of the fictional main character of The Wizard of Oz.

An incredible little museum of interior design full of artifacts collected from around the world.

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.

Some locals believe the fabled lost gold of General Yamashida is hiding somewhere beneath the city.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

A Hungarian optometrist's charming collection of Asian art and curiosities.

Cryptid lake monster honored with its own monument.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

A local museum honors the overlooked discoveries of Mary Anning, one of the first professional fossil hunters.

The site of a mysterious pony massacre is rich with extraterrestrial conspiracy theories.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

This small commune with an even smaller name appears to have an unlikely amount of dead ancestors.

A modern-day cabinet of curiosities housed in a 300-year-old inn.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

A fascinating assortment of cave dwellings, medieval ruins, and sarcophagi are being devoured by the forest.

A gazebo that inspired the fifth episode of the "Twilight Zone" still stands in the creator's hometown

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.