One of the largest helium balloons in the U.S. is a 112-foot ginormous orange.

Oldest building in California still in use.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

The first declared National Monument in the United States.

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

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

The unbelievably opulent home built for an infamous newspaperman.

Thousands of turbines whir at at the origin of North American wind power.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

This giant temperature attraction created some giant electric bills.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

When ecosystems collide in the arid Southwest.

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

The largest source of fossilized insects anywhere.

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

This recently restored timepiece has stood all around Kansas City.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

This otherworldly church spire reaches up toward the heavens.

The record holder for the world’s largest peach.