Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

A gorgeous example of 13th-century Gothic architecture.

Pilgrimage site for star-crossed lovers.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

Thousands of flowers create enchanting pink tunnels over the city streets.

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.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

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

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

Buy your fish and have it cooked to order in this bustling, eight-floor seafood market.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.

This missionary's legacy looms large over the Upper Peninsula of Michigan—literally.

Largest outdoor staircase in the United States.

As its grandiose name implies, this wooden dome is unsurpassed in size.

Egyptian Revival obelisks still rise over the old mine shafts.

A comedy troupe's collection of bizarre humor.