The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

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

Known as "The Hill of the Little Devils."

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

Meet manatees face-to-face at this zoo for native species.

A tribute to Ponce de Leon's supposed quest for eternal youth.

Location of a reliquary containing bone fragments of 18 saints.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

Where serial killer Aileen Wuornos drank her last beer.

A forgotten sea village stands silent after hurricanes deemed it obsolete.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

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

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

The only road through the heart of Glacier National Park.

A beautiful geyser under environmental threat.

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

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.