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The structure was abandoned more than a thousand years ago without ever being used.

The first dimension is height, the second is width, the third is depth, and the fourth is time, but no one has yet been able to explain what is the fifth dimension.

A comet recorded by the Aztecs appears to have foreshadowed the arrival of the Spanish conquerors.

It is believed that during the day this deity emerged from the water and taught the human race arts, sciences and writing.

St. George's Church is one of eleven monolithic churches carved directly into the rock in Lalibela, Ethiopia.

Stories about lost cities full of riches were prevalent in medieval times and several of them remain to this day.

The earliest known astronomical observatory in the Americas was built by an unknown culture, long before the Incas rose to power in Peru and began to celebrate their Sun God.

The site is so impressive that it became known as the "Pompeii" of America.