Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Colorado's only true geyser is hidden within the San Juan National Forest.

One of the largest Marian shrines on the West Coast stands rather unexpectedly in Silicon Valley.

A lawless town deep in Death Valley was famous for its riches and death rate.

A massive ultra-modern church presents a science-fiction view of Catholicism's inclusive future.

Large but largely ignored, these 42 life-size Liberty Bell replicas were a peculiar, unexplained feature on the facade of a Macy's department store.

Southern California’s Theme Park Beginnings.

A monumental cross hides in the trees in Golden Gate Park.

The blinking light atop the iconic landmark has been sending secret messages for decades.

An Old West film set seen in countless TV shows and movies is open for the public to explore.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

Where the writer penned his famous story about a jumping frog.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

On the side of Arkansas' Great River Road stand the remains of a forgotten World War II POW Camp.

A large stone map of Arkansas awaits visitors to its highest point.

Three markers installed over the course of 140 years mark the point where Arkansas, Missouri, and Oklahoma converge.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

The only diamond mine in the world where you can keep what you find.

This little-known memorial honors those who have donated their bodies to medical training.

Medical museum featuring a number of excellent medical models.

Colloquially known as "the lynching memorial," this is the United States' first memorial to the victims of racial terror at home.

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.