This vast kitty-themed collection illustrates the history of human-cat interaction.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

These markers are used to document elevation changes around the famed dam.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

A beautiful Victorian-era cemetery, complete with a miniature village.

The bears may be gone, but their old cages can still be found.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

The granite monument is engraved with the image of the talking horse's head coming through a barn door.

Giant papier mache hog sits on private property.

This century-old roadside attraction is full of bizarre rock formations.

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

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.