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

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

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.

Drink wine handed out through a window as part of an age-old tradition.

This striking art museum holds an amazing series of curiosity cabinets.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

A unique botanical garden housed in three giant geodesic domes.

This replica of the Greek structure is in the heart of Nashville.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

FDR's Art Deco hospital tower was hopelessly inefficient.

An astounding collection of medical specimens, including bits of President Lincoln.

This water tower has been a staple of the Rochester skyline since 1931.

A lovely hidden waterfall right off the highway is well worth a stop.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

There aren't too many operational funiculars around, but Pittsburgh has two!

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

This smiling statue memorializes local cartoonist Bob Montana and his legendary creation.

A tunnel with windows, so you don't miss out on the impressive views.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The highest point in Washington state is a volcano covered in glaciers.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.