A spiritual sanctuary in a natural cave.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Erotic art covers the walls of the largest ancient pleasure palace.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

Five candy-colored villages on the Italian Riviera.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Built by a king and rebuilt by an emperor, this aqueduct transported water for 1,200 years to this ancient Mediterranean hub.

The abandoned shell of what would have been the Jordanian royal family's summer palace.

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

A Biblically notable site over the ruins of an ancient city that is now a protected World Heritage site.

The tallest waterfall in the Judean Desert is named for its connection to a biblical figure.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The home of the Dead Sea Scrolls is an abstract modernist dream.

This enormous censer uses a pulley system installed over 400 years ago.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

This black shoreline is made up of exploded lava particles.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The fifth-longest natural arch in the world, and the longest outside China.