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

Single runway interrupted by a busy road that cuts across its middle.

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

A Wild West saloon that helped define a generation of psychedelic rock.

This beloved roadside attraction welcomes visitors with his signature neon smile.

Bill Murray bowled three straight strikes here at Reno's "Taj Mahal of Tenpins."

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

The only surviving prototype of Buckminster Fuller's revolutionary car.

An iconic 1960s theater with a Buckminster Fuller-style geodesic dome.

This mother-daughter run curiosities shop is a beautifully odd mix of taxidermy and exotic plants.

Its founder calls it a "proletariat art renaissance".

The arch that celebrated the completion of the Lincoln and Victory highways.

This 18-foot-tall steel lotus is a meditation on ecological crisis that originally appeared at Burning Man.

The unexpectedly beloved remnants of a controversial thermal power plant.

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

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

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.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

A portal into the bricked up canal that runs through the heart of Washington D.C.