A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

Where commuters walk through remnants of an ancient Greek necropolis.

Preserved portions of Athens's ancient defenses are on display in a subterranean parking garage.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

This small museum once served as a royal hunting pavilion for King Otto Friedrich Ludwig.

This small chapel holds the mummified heart of one of the heroes of the Greek Revolution.

Large collection from the 3rd millennium BCE.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

A sharp sculpture made of thousands of pieces of jagged glass.

A sprawling collection of books and manuscripts about ancient Greece that would have put their famed libraries to shame.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

What once sat in the world’s spotlight is today a largely disused ghost complex.

The heads and relics of 179 monks slaughtered by pirates are on display within this Ceonobic Monastery.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Acres of English cottage gardens, unexpectedly nestled in a Cleveland suburb.

This massive airship factory is so large that it has its own indoor weather.

Experience a charming 1930's version of "infotainment."

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Tiny horses tethered to antique rings are scattered around the city.