This grave marks the final resting place of pioneer John Chapman, better known as Johnny Appleseed.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

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

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Illegal drag racing two stories beneath Chicago’s streets.

A display of magnificent stained glass windows is the first exhibit of its kind.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

World's second largest particle accelerator, where nature reveals its secrets.

A historic and oft-filmed prison stands in a Chicago suburb.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

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

The first declared National Monument in the United States.

This town is home to the world’s largest arch constructed entirely of elk antlers.

The only road through the heart of Glacier National Park.

Spectacular views await visitors to this lake.

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.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

No Gordon Lightfoot song, only a barebones monument to greed.

This rustic old building is said to be the most photographed barn in America.

The drama of nature in full effect in this Nevada State Park.

These markers are used to document elevation changes around the famed dam.