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

A museum dedicated to the alleged Roswell Incident.

A blacklight journey through a celestial art exhibit.

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

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The ruined doorway is a portal to the building's turbulent and torturous past.

Where Cusack's record store from the film "High Fidelity" was located.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

Former bath house turns gastropub.

An office built to look like a giant basket.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

This small plaza encourages people diagnosed with cancer to never give up hope.

An unassuming 13-acre park is home to over 12,000 roses.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

A gas station has taken the place of the home of the 19th American President.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

Rare recess caves fill this unbelievably beautiful Ohio park.

The mounds at this site were reconstructed with the help of archaeologists and historians.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

A giant green dragon crawls down from the roof of the Providence Children's Museum.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.