Exploring the wilder, more passionate sibling of Erg Chebbi feels like discovering a secret sun-kissed planet from another galaxy.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

An abandoned horror film set sits eerily along a highway through Hollywood's "door to the desert."

A fortified city, home to a remaining population of five families

A mud brick kasbah with a history of lavishness and traitorship.

The longest stone bridge in England has an impressive history that dates back over 700 years.

The storied English village that pretended to be insane inspired NYC's nickname and the fictional namesake in the DC Comics universe.

The alleged birthplace of Lady Jane Grey, who was executed at age 16 for claiming the throne of England.

The final resting place of the poets Shelley and Keats.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A Nesting Doll of Churches.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

An alchemist's "magic door" stands in the middle of a Roman park.

The history and future of cannabis.

A floating cat sanctuary on an Amsterdam canal.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

A curious collection dedicated to human and animal anatomy and pathology.

A public urinal so pretty, it was declared a national monument.

This unreal Portuguese palace looks as though it's made from a pile of different castles.