Living towers made of people that are now recognized by UNESCO.

A fantastic Christmas tradition where defecation meets the manger.

Dunk your churros in rich hot chocolate on the city’s old “Chocolate Street.”

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

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

An ancient Egyptian temple in the middle of Madrid, Spain.

The smallest bar in Amsterdam has stayed in the family since 1798.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

Amsterdam's former hotspot for public executions and dissections.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

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

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

An abandoned Byzantine fortress and notorious prison.

This architecturally eclectic early-20th century mosque was built as a place of worship for the Islamic followers of a Jewish messiah.

One of the most photographed locations in the entire city.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

This fortress was built using the last surviving stones from the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World.