The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

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

A battle between nature and architecture in the Cambodian jungle.

Known as the most dangerous bridge in the world, the Hussaini Hanging Bridge is only one of many precarious rope bridges in Northern Pakistan.

Roman ruins top white travertine terraces formed by ancient hot springs.

Roman ruins, natural methane fires and a lovely beach.

A marvel of Byzantine engineering under the streets of Istanbul.

Tibetan-influenced mountain fortress in Northern Pakistan.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.