The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

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

The first declared National Monument in the United States.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

Home to items never before seen by the public.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Mysterious rocks that ring musically when struck.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

This jail which was in service for over a century is now open for curious visitors.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

A field of nothing but boulders which resembles a giant's gravel driveway.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.