Two stunning 17th-century libraries and a cabinet of curiosities.

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

Barcelona's only remaining tram system takes riders to the Tibidabo funicular.

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

Mountain where Jesus was first tempted by the Devil.

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 bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

Through the decades, Black music stars have performed at this historic hub for music and the arts.

D.C. once had its own tiny rival to the New York Stock Exchange.

Also known as the Founding Church of Scientology.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

Look closely and you’ll notice that the color changes a third of the way up the tower.

This nine-story building is the oldest standing skyscraper in D.C.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.