The park is home to the United States's only still-operating Dutch windmill.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

The world's largest wooden structure.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

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

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

In a pedestrian tunnel on North Carolina State’s campus resides an expressive and artistic free-for-all.

A blacklight journey through a celestial art exhibit.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A natural formation that resembles a camel resting in the New Mexico desert.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

The oldest continuously occupied public building in the United States.

Steep canyon walls hide a forested oasis in the West Texas desert.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

These unique volcanic rock formations offer the perfect opportunity to camp and hike.

A museum devoted entirely to the rattlesnakes and snake-related art.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.