At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

The site of the climactic scene from the classic horror film is now a historic landmark.

Metro station with a claim to rock n' roll fame.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

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

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This replica of the Greek structure is in the heart of Nashville.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Portlandia is the second-largest copper repoussé statue in the United States.

The magic's in the hole!

Elevated freight railway turned wildly successful urban park.

Salute the leader of the proletariat.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This "floating railway" is one of the world's oldest monorail systems.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

These pretty kitties killed and ate as many as 135 railway workers.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Home to a protest movement, a bombing, and a dramatic change in labor history.