Surreal riveted sea forts once protected the Kent shores from German attack.

A rare wooden coffin set vertically into the Gothic arch of an ruined church.

This abandoned gun tower was built to defend the River Thames from a French naval attack.

An enigmatic sculpture depicts a ruined home with debris stretching for over half a mile along the river.

These ruins of Francis Bacon's once-magnificent manor are hidden in the English countryside.

Artists have long been drawn to these atmospheric 12th-century ruins.

In the quiet village of Fulmodestion, the ruins of a medieval church remain hidden among vines and foliage.

A witch wreaks ruinous revenge on this ancient church with her "enchanted leg."

An eerily charming collection of salvaged buildings and curios grown out of a family scrap business.

A mysterious artist-run cabinet of curiosities and library.

This restored opera house is named after a soprano known for tragic romance, exile, and a truly uncomfortable wedding.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

This eccentric cave dwelling is bizarre even by the standards of a subterranean town.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

A whimsical garden of outsider art in the Spanish countryside.

Extraordinary sculpture garden created by an eccentric English poet.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

This church, buried halfway in lava rock, is all that remains of a Mexican village destroyed by a volcano.

This church devoted to Mexico's "dead saint" is a festive celebration of a formerly hidden religious figure.

Climb through the life of a Mexican hero as you ascend a 130-foot statue.

This fantastical house shaped like a seashell brings aquatic design to architecture.

This small museum holds a treasure trove of ceramic figures that are either a hoax or proof of dragons, aliens, and dinosaur riders.

An island filled with hundreds of hanging, decomposing, decapitated dolls.