A historic shipbuilding town is home to a sail-through fish-and-chips shop.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

This ancient Spanish castle sits high upon a hilltop.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

A modernist church in an ancient village.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

The last of three massive blast furnaces that were once at the foundation of the Port of Sagunto economy.

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

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

During an annual Catholic feast in this tiny Spanish village, men dressed as devils leap over rows of babies to cleanse them of sin.

Medieval ruins nestled within a breathtaking swath of Spanish nature.

Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

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

Now abandoned, the world's first torpedo factory is crumbling into the sea.

This huge metal monument is slowly being stripped to its concrete skeleton.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

Yugoslavia's biggest underground airport lies in ruins.

The only gulag ever to exist in socialist Yugoslavia.

Wonderfully preserved Victorian factory, complete with a preserved steam powered engine house.

Its look is severe, but its location, isolated on a hill in the middle of the countryside, is particularly scenic.

A haunting collection of sunken wooden barges litters this Italian river bend.

The ruins of this medieval castle overlook the lake of Piediluco in what was once a sacred forest.

An abandoned village that resides along the mountains of the Aosta Valley.