Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

This Romanian village may have been drowned, but it is long from forgotten.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

A Spanish forest is filled with mysterious stone carvings.

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

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Vibrant street art created with mixed media.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This house's itty bitty size means no humans allowed.

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

Remote, beautiful, and stigmatized, Las Hurdes is Spain's version of Appalachia.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

A landscape decorated with enormous skull sculptures.

The deserted remains of a luxury hotel turned hospital ward.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

Geological storytelling.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

The earliest known map to show America, discovered by accident at a Paris bookshop.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.