This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

Besides being home to cave paintings and pre-Columbian Cuban archaeological remains, you get to take a boat through this stalactite and stalagmite covered cave.

Neo-cave art on the macro scale.

This statue in Plaza San Francisco commemorates a beloved figure from 1950s Havana.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The world's largest wooden structure.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

A garden in Lisbon filled with giant porcelain creatures.

One man's remarkable private collection of art from around the world.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

Sip cherry liqueur at a bar dating back to 1840.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Step back in time at this 19th-century kiosk.

This little-known national museum houses over 40,000 works of art from across the world.