Mosaics, storks, and brothels—this ancient city has it all.

Breathtaking and huge 430 year old maps of Italy.

A submerged archeological park still holds the wonders of a Roman Sodom.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Beijing's expansive subterranean hiding spot now crumbles away as a tourist destination.

An underground city of salt.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

For those with no fear of heights: a skywalk 4,700 feet up on a Chinese mountain.

This lab's maddening silence is good for business but bad for sanity.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.