Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

This Neolithic passage tomb forms part of a World Heritage Site.

This European portal tomb has a capstone that weighs around 150 tons.

A hugely vast Irish landscape of barren rock that stretches for miles.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

The ancient tomb acts as a calendar that keeps perfect time.

This single room has survived the centuries with almost no deterioration.

The only quarter of the Old City not dedicated to a major world religion.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

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

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

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

What is left of the pillar of Saint Simeon, the voluntary martyr who climbed the column to give his sermons, remaining perched there for thirty-seven years.

One of the oldest and largest castles in the world.

Ruins of the Crusaders' headquarters.

Mysterious lost empire of the Silk Road.

The 20th-century archaeologist was interred among the ruins of an ancient Roman city.

Perched above the bustling town of Kerak is a sprawling, ruinous castle that has witnessed nearly a millennia of Levantine history.

This restored eighth-century palace is a shining example of ancient Umayyad architecture.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.