This 15th-century island fortress later served as home to the executioners no one wanted to live near.

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.

Where commuters walk through remnants of an ancient Greek necropolis.

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

Underneath one of the region's most historic roads lies the home of Plato's successor.

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

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

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

This tower was once used to create ammunition for early settlers.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This monument is dedicated to those lost on June 6, 1944, in the town with that day’s highest per-capita casualty rate.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

A computer bug so primitive it was an actual insect.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

A historic dam made famous for its turbines and feature in a Hollywood classic.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.