This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Miraculous tree that seems to sprout out of solid rock.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

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

This historic Union Pacific Railroad depot is a stunning symbol of American post-Civil War progress.

One of America's largest retirement communities has its own history museum

The official portrait of California's longest-serving governor has been likened to "spilled ketchup and soy sauce"

This one-room school in the tiny railroad settlement of Elgin didn't close down until 1967

This lucky stone from Ireland is embedded on the corner of a Reno casino to grant luck

Visit a World War II era coastal battery in the center of one of Hawaii’s main tourist destinations

St. Mary in the Mountains is the oldest active Catholic church in Nevada

Ruins of this late 19th-century mining camp are right on Nevada State Route 266

A volcanic spur of Lake Tahoe wrapped in Washoe sacred stories and road tunnels

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

This award-winning men's bathroom was just too beautiful to not allow women to see.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

A 26-foot-tall jackrabbit celebrates the past and future of the Southwest.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

The first of the iconic American roadside attractions lives on as a college mascot.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.