Continuing the tradition of the dime museum in style.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

A museum dedicated to the alleged Roswell Incident.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

Immortalized by artists, this church incorporates a medieval lighthouse into its shoreside structure.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

Of course Salvador Dalí lived in a castle...

A darkly erotic open-air statuary in Catalonia.

A Romanesque tower appears when water levels drop.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

One man's personal kunstkammer, museum and shop.

A hospital where antique dolls are given new life.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

Abandoned railway line circling the city of Paris.

Local legends say that fairies used to dance in the moonlight here and invite handsome young men into their grottoes.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.