Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

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

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

Where commuters walk through remnants of an ancient Greek necropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

35,000 grape hyacinths flow like water down a garden hill.

For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

The seat of Buffalo government is a gorgeous Art Deco palace.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.

The prototype for all Nazi concentration camps.

The footprint of a frustrated devil in Munich's Cathedral.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

Marigolds, rosemary, Madonna lilies, and the Virgin’s Bower decorate this Massachusetts sacred garden.

A very classy 1920s-era bar right in Grand Central Station.

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.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Plans for this peninsula included houses, the United Nations Headquarters, and a nuclear power plant. When none of them worked out, it became an expansive park.

This classic red schoolhouse is said to have been where Mary and her little lamb went to school.

America's "second most important bell" is a contentious spoil of the Civil War.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Illegal drag racing two stories beneath Chicago’s streets.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.