An impressive home made of stone, carved more than a century ago.

A 16th-century Andalusian palace.

An artist's statement of new uses for ordinary and discarded materials.

A house covered entirely with shells.

The house's confection-like decorations are the result of one man's painstaking work over decades.

This snug medieval lane is one of the narrowest streets in the world.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

Hundreds of thousands of ancient documents offer a unique glimpse into Jewish life in Cairo.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

Slum Settlement Filled With Mountains of Garbage.

A strange aquarium with stuffed fish, and almost no water for them to swim in.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A rare view of a preserved Victorian science museum.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

A daily replay of the experiment that proved the rotation of the Earth.

World's first "penitentiary," meant to be humane, drove men insane.