The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

A retired military stronghold on the rolling green coast of Donegal.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

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

This ancient mountain monastery welcomes all manner of faith in an effort to keep Christians in Syria.

Step back in time and witness the fall of Constantinople.

A marvel of Byzantine engineering under the streets of Istanbul.

1513 Turkish world map, full of European state secrets and snarky commentary.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Ancient serpentine sacrifice holder that has stood the test of time.

A fountain standing as a testament to a doomed alliance.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

A 1970s resort city now stands abandoned, caught in the middle of a divided island.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

An ancient capital city that dates back 3,000 years and harbors many surprises.

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

Dig for your own trilobites in this goldmine of invertebrates.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.