This lonely minaret with an unusual decorative symbol is all that remains of a historic Ottoman mosque.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

An unfinished Serbian Orthodox church with 1,389 golden crosses planned to represent the Battle of Kosovo.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

A futuristic, brutalist masterpiece that is also strangely prison-like.

The ornate miniature mansions were built for Istanbul's feathered residents.

This dark, damp, perilous tunnel is the only passage from north to south Tajikistan.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Huge stairway leads to this massive gallery.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

A unique work of automotive art calls this shopping center home.

A beautifully eclectic mix of architectural styles.

Cat art as far as the eye can see.

The large collection of pre-Columbian pottery might make you blush.

Tucked behind the Institute of Neurological Science down a decrepit street resides the largest display of human brains in Latin America.

These giant mummies are set ominously into a Peruvian cliffside and topped with real human skulls.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Brush shoulders with animatronic Arab leaders made of silicone.

Lebanese castle built by one man, over a lifetime.

Mummies preserved naturally for seven centuries.

This modernist cinema has survived war and reconstruction to become a symbol of Lebanon’s revolutionary spirit.

A patchwork of ruins from various civilizations in one of the world's oldest continually inhabited cities.

A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

The largest hewn stone in history.