This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The remains of a British railway rusting in the jungle mist of a Brazilian mountainside.

A sweet symbol marks the place where torturous executions were once carried out.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

A part of the world's largest marsh seems to be growing bright red Martian grass.

A giant bronze monument to Kim Il-sung and Kim Jong-il is one of the most sacred sites in North Korea.

The hallucinogenic center of the ancient world.

What once sat in the world’s spotlight is today a largely disused ghost complex.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The middle finger of modernity.

The ghosts of Britain's telecommunication past sit rusting away in a small village in England.

Sidney Scurvy, the interactive computer sailor, takes you on a journey to discover the everyday lives of Cook and his men.

The legend of a monkey that was hanged as a spy has inspired not only a football team name, but a successful mayoral campaign.

A million and a half tons of earth were used to create one of the world's largest land sculptures.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

A lone pole once used to display a man's corpse now stands empty, but the memory remains.

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

A 26-foot shark sculpture—a statement about bombs—set off a municipal battle royale.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The television series' iconic giant foot was borrowed from this classical painting.