Death rituals and sacrifice inside a Peruvian megalith.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

One of the most photographed locations in the entire city.

An abandoned Byzantine fortress and notorious prison.

This famous archeological mystery may be an ancient example of movable type.

This legendary city has been a tourist attraction for centuries.

Step inside an ancient beehive tomb built for a mysterious cult hero.

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

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

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

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

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.

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

Dedicated to the god Dionysus, this theatre was used for both musical and theatrical performances.

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

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

Will Geer's outdoor theater started as a mountain retreat for actors, musicians, and other artists who were blacklisted during the Red Scare.

The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.