A jaw-dropping brutalist space church seems to have crash-landed in the middle of America.

A fitting attraction for the corn capital of the world.

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

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

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.

The first declared National Monument in the United States.

A sprawling museum located on the former site of the Orphan Girl Mine.

A smoke stack so large, the Washington Monument could fit inside!

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

An entire town preserved as a historic landmark.

This amazingly preserved Gold Rush town is a historian's dream.

These unusual rooms on wheels are holdovers from the 1960s.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

A former major munitions plant that has been converted into a sprawling art space.

This pun was simply waiting to come to life, and one defense contractor made it so.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

Outsider art meets paleontology at this roadside reptile repository.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

It was once the base for a series of domestic terror attacks.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.