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

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

Legends surround an ancient tree trunk riddled with nails for good luck.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

The oldest working mechanical clock in the world.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Home to the most complete dodo remains known - one head, and one foot.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

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

Enter the cabin of a life-sized Hindenburg replica.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A marvel of Byzantine engineering under the streets of Istanbul.

The final resting place of the great navigator, or maybe his brother.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

A fantastic castle rumored to be the birthplace of King Arthur.

A monument to the military service of America's greatest traitor refuses to even name him.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Recently restored menagerie of Victorian-era beasts.

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.

Two monstrous warehouses. One now holds priceless works of art, the other stands abandoned and dilapidated.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.