Magnificent Roman ruins lie vulnerable to destruction on the edge of the Mediterranean.

A fortress-like granary that has been continually in use for more than nine centuries.

A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

One of the oldest monasteries in the world is a key pilgrimage site for both Muslims and Christians.

Only a handful of these gorgeous historic waterwheels remain but even those are in danger from local unrest.

This ornate mosque is said to hold the remains of Muhammad's granddaughter beneath its dome of pure gold.

Amid the rubble of Aleppo's Old Quarter, part of a historic market has been restored and re-opened.

One of the oldest and largest castles in the world.

Ruins of the Crusaders' headquarters.

Mysterious lost empire of the Silk Road.

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.

After this one-of-a-kind palace was built the architect's hands are said to have been cut off to keep it that way.

The most southern point you can drive to in the Western Hemisphere.

This dazzlingly turquoise mountain lake was created in the wake of a natural disaster.

The "Mystery and Company of Merchant Adventurers" is an Elizabethan-era hangout in Moscow.

The reason for the strange contortions in the trunks of these "drunken" pine trees in Russia is still a mystery.

Thousands of ancient rock carvings are scattered just off the highway.

Tibetan-influenced mountain fortress in Northern Pakistan.