The little-known second castle that William the Conqueror built in York.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

The final resting place of the famed German pilot, the "Red Baron."

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

This old wooden funicular railway leads to a cemetery in the forest.

This figure of a local merchant is said to reanimate and do a dance during Hogmanay.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

One of the oldest Black communities in western North Carolina and one of the largest Black Mennonite congregations in the country.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Legend says this sacred tree was a gift from goddess Athena.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

A remarkable feat of Victorian engineering across the Firth of Forth.

This metal disk commemorates the birth of a historic American holiday.

Jule Körner's house full of bizarre architectural details.

This facility, now a museum, once housed and trained U.S. Army Air Force pilots who flew during the Allied invasion of Normandy.

Once considered a marvel of engineering, this 107-mile canal played an integral role in building New York City.

This ancient stone bridge dates back to the early Middle Ages.

From golden eagles to peregrine falcons, this rehabilitation and education center is a haven for birds of prey.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

From failed port town to Civil War fort, the ruins of this former defense saw their finest day in the television age.

This centuries-old graveyard is the final resting place of the Fort Fisher Hermit.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.