Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

This simple, broken column marks the final resting place of one of America's most famous explorers.

One Confederate statue that accurately reflects the ugliness of its subject.

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

A key producer of charcoal iron in the early 1800s, the structure still stands today.

Miraculous tree that seems to sprout out of solid rock.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

The largest self-built castle in the U.S., six decades in the making.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

Home to the deepest rift anywhere on Earth.

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

A beautiful geyser under environmental threat.

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

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

Site of the greatest known waterfall that ever existed.

An obscure waterfall that looks like something out of a fantasy novel.

Protected from the elements, these Native American rock paintings have survived approximately 250 years.

The decorations were inspired by an unlikely missing treasure.

This playground sculpture of an icon from the past is dedicated to the children of the future.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.