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

An architect's childhood fantasy treehouse made real.

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

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.

The first declared National Monument in the United States.

A fitting attraction for the corn capital of the world.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

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.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

Tacoma’s 25-foot coffee pot music spot has served up over 80 years of concrete kitsch.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

A tunnel dug through the side of a mountain by hand provides convenient yet death-defying access to a small village in China.

An ancient fortification lives on in this Chinese city.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.