This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

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

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Mountain where Jesus was first tempted by the Devil.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

Oversized versions of a beloved toy dot a children's playground in a Spanish toymaking town.

The magnificent sanctuary is Spain's first purpose-built structure of its kind.

A contemporary art installation housed within a Gothic cathedral.

This historic electric train has operated with regularity since the early 1900s.

This historical manor is complete with a magnificent garden.

Twelve sweet, nutty, life-sized statues are housed in this second-story shrine to almond paste.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The world’s first penitentiary, meant to be humane, drove men insane.

Where America’s first doomsday cult awaited the end of the world.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.