The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

This grand gothic brewery has been pumping out suds for over a hundred years.

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

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.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

One of the smallest towns in the United States.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

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

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

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

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.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

This small hill features the most notable collection of petroglyphs in Saguaro National Park.

The lobby of this hotel near the U.S.-Mexico border features a stained-glass mural that measures 42 feet long and 6 feet tall.

Millions of years of erosion created the feature for which this rock formation is aptly named.

Archaeologists believe this panel of petroglyphs depicting descending sheep and other figures in Glen Canyon are 3,000 to 6,000 years old.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

This Native American settlement dates back to the Pueblo II period.