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

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A stately palace has been converted into the world's largest cannabis museum.

A once-secret library of Freemason history in Catalonia.

The world-record holder for the longest bridge stretching continuously over water.

Once a slice of Cold War-era military history, this museum is finding its future in the stars.

In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

A delightful Hans Christian Andersen fairy tale experience, not far off the interstate.

The World's Largest Bull.

Millions of dollars worth of sculpture decorate this Iowa city center.

Architectural elements and building materials for this house were transported from Salisbury, England.

A unique work of outsider art sourced from scrap metals and signifies conservation.

Romance fans worldwide make the pilgrimage to this group of historic covered bridges in rural Iowa.

This simple home was the beginning of a long journey for the iconic Western film star.

This restored 18th-century house was once the home of Lititz's first tobacconist.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

A layered tribute to the work of mosaicist Isaiah Zagar.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

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

America’s smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

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

Mural made of 100,000 pieces of hand blown glass, and one of the largest glass murals in the US.