This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

Ancient Manuscripts showcase the civilization of West Africans during the Middle Ages.

Ancient church constructed with a special wood that preserves prints from the past.

Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

Rome's ancient Etruscan rival, now a park full of ruins.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

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

Ancient snack bar of the Roman Empire re-opened.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

Hydraulic systems in an ancient underground Iranian city.

Ancient paintings known as the "Sistine Chapel of Cave Art."

Marking the ancient boundaries of asylum around Beverley Minster.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Ancient mysterious ruts carved in the bedrock.

A deadly ancient portal to the underworld.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Scattered throughout London are ancient remnants of the city's former bounding wall.

One of the oldest living oak trees in the Southeast.

The largest earthwork effigy in the world.

The ancient tomb acts as a calendar that keeps perfect time.

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

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.