A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

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

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

The ruined doorway is a portal to the building's turbulent and torturous past.

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

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

Cat art as far as the eye can see.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This Little Rock legend has survived decades of rowdy crowds, three fires, and a zombie wedding.

Yup, that's where the name came from.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

This homegrown adoption center offers a wonderland of feline companionship.

Mass graves and Victorian monuments mark the history of Memphis in this 19th century cemetery.

The juke joint where legendary soul artists ate, drank, and made merry.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Home to drunken tower-climbing goats... seriously.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

A museum dedicated to the history and exploration of both popular music and science fiction.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The fountain marks the area where hundreds of accused witches were burned at the stake.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.