A submerged village appears when dam levels drop.

Long tunnels run under the ancient chariot racing circuit to the tower.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

The oldest Roman lighthouse still in use.

Giant granite sculptures representing family on the northern coast of Spain.

The remains of an encyclopedic sculpture garden later used as an internment camp.

This star-shaped military outpost is now simply trying to protect itself from neglect.

This Funeral Hearse Museum represents the finest in cadaver transportation.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Of course Salvador Dalí lived in a castle...

Moorish signal station on a stratgic rocky outcrop.

Abandoned Nazi train station turned underground astroparticle laboratory.

A Nesting Doll of Churches.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

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

An omelette made with over 1,000 eggs may have been prepared when Holy Roman Emperor Charles V visited this monastery.

Hidden in a high mountain cave, this hermitage dates back to the ninth century.

Ancient cave tombs known as the "houses of fairies."

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

The secret medieval communication system will whisk your words above the noise of the crowd.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The ruins of this Roman temple dominate the small city in southern Lazio.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

A medieval stronghold rising over the ruins of ancient Roman villas along Rome's southern coast.