Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

Water flowed out of the town's unusual tree stump fountain in the 1930s, and the well still runs today.

Dubbed the "Blade Runner dragon," this buzzing neon sign is a beloved local icon.

There aren't too many operational funiculars around, but Pittsburgh has two!

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A beautiful geyser under environmental threat.

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

An architect's childhood fantasy treehouse made real.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Scale replica of China's ancient terracotta tomb warriors and Forbidden City are the side project of an eccentric millionaire.

The world's tallest statue of an American hero.

Largest man-made excavation on earth!

The largest island on the great salt lake is home to curious creatures and strange stories.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

Jurassic Park—A Still Life.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.