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

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

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

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.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

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

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A quiet nook at the top of a little-known hilltop park named after California's first poet laureate.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

A small 12th-century temple surrounded by waters believed to have curative properties.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

This Cambodian riverbed is covered in ancient Hindu carvings both above and below the waters.

Hoax, mistake, or evidence of dinosaurs in human times?

A battle between nature and architecture in the Cambodian jungle.

Bombed and burned, this monument represents the often controversial ties between Vietnam and Cambodia.

The capital of Cambodia is named after the hill on which this ancient temple complex stands.

Khmer Rouge's high security prison.

One of the biggest markets in Asia, under one of the continent's largest domes.

5,000 skulls in memorial to those killed by the Khmer Rouge.

A beautiful 62-acre Catholic shrine and botanical garden.

Limestone caves with spectacular showcase chambers.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.