A dreamy mausoleum honors Persia's most famous poet.

The palace of the King of Kings, burned by Alexander the Great.

Marked by the hand of the explorer Henry Morton Stanley.

The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

A historic trade hub teeming with gorgeous architecture, colorful goods, and vibrant designs.

This ancient burial site is believed to be one of the first earthquake-protected structures in the world.

17th century mosque for Shah Abbas' harem.

These little castles each held thousands of pigeons.

Long before air conditioning, Persian architects found an ingenious way to cool off.

Brussels' favorite peeing boy has a sister.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

Moscow's imposing monument to the Space Age.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The amazing wonder cabinets of a very rich Austrian archbishop.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

A miniature city, once ruled by the Queen of the Netherlands.

The home of the Dead Sea Scrolls is an abstract modernist dream.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The last bastion of Roman presence north of the Alps looms over a German town.

One of the most well-preserved temples of ancient Egypt.

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.