Tubing through a cave lit with glowworms is a magical underground experience.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

Ancient site of Mongolian Shamanism located near a road leading out of Ulaanbaatar.

An exceptional assortment of fossils recovered from private collections.

A nondescript dirt lot hides an intriguing center of shamanic healing.

Enormous statue of the Emperor of the Mongols.

The growing stones of Romania.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

This amended headstone marks the grave of a participant in one of the most successful military deceptions of all time.

An eerie, derelict amusement park in Berlin.

This little gem in the Gulf of Riga has a very rich heritage and distinct culture.

Dedicated to the untimely death of American balloonist and parachutist.

Relics from an era long gone, sit idle outside this Estonian museum.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

This free museum is building a collection of books that are banned, censored or burnt around the world.

The oldest continuously operating pharmacy in Europe.

Thousands of graves lurk below the surface of this park.

A forest park outside Tallinn full of architectural and artistic curiosities.

One man's personal kunstkammer, museum and shop.

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

A macabre anatomy museum tucked within an old Italian hospital.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

Nestled in the heart of Milan is a real wunderkammer of morbid curiosities.