These 400-year-old ruins are all that's left of the monastery where Ines de Castro was assassinated by the King of Portugal.

Elaborate tile work in this railway station tells the story of Portugal.

A hidden three-foot-wide house separates these two regal churches.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

The best place in the world to buy tinned fish.

Perhaps the most spectacular grotto along the Algarve coastline.

This small island, a byproduct of 19th-century canal construction, is now home to a charming Japanese garden.

Home to the "Rat King" of Nantes and other wonders of the natural world.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

The humble tomb of an Argentine general, hand-built by his son using stones brought down from the Andes.

A small but industrious mining operation that allows visitors to touch precious gems while they are still in the rock.

A bright little alley in La Boca is a part of tango history.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

The metal leaves on this tree are engraved with the names of Holocaust victims.

Budapest's Communist-era statues, banished to the suburbs.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Museum dedicated to the terror regimes of Hungary.

This garden houses the remains of the ancient Greek port of Marseille.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.