Diego Rivera's massive tiled fountain and failed infrastructure project.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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.

An architect's childhood fantasy treehouse made real.

A beautiful geyser under environmental threat.

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

A place to eat for on-the-run agents and espionage enthusiasts.

A beloved Chicago music venue offering cold beer and lots of “Friendly."

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Walk the whole Mississippi River!