The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

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

An architect's childhood fantasy treehouse made real.

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

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

Spectacular views await visitors to this lake.

This museum is a full-size replica of an original church constructed during the 13th-century.

The intense competition of the 19th-century fur trading industry played out at this fort in Western Canada.

Journey through the largest remaining peat bogs in the contiguous United States to see the wilderness as it once was.

Home to a 26-foot-tall statue of an American icon.

This 25-foot-tall statue was built as a protest to a property dispute.

The remnants of an early American attempt at missile defense.

A stone face watches over the river.

An amazing collection of sculptures and art.

This friendly fellow was built to honor an advancement in mineral processing.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

Come for the springs; stay for the mud bath.

The larger of two volcanic peaks rising out of the crystalline waters of the Caribbean.

This whimsical fountain pays tribute to Toronto's four-legged friends.

The giant birds honor two native North American species.

This urban oasis is a marvelous meld of music and landscape architecture.