The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

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

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

The first declared National Monument in the United States.

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.

The world's largest Holstein cow.

A true roadside icon standing on the same plains that the herds once roamed.

This two-room shotgun shack in Tupelo is the birthplace of a King.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

The blinking light atop the iconic landmark has been sending secret messages for decades.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

The 10th-tallest pyramid in the world, this former sports arena is now home to a massive Bass Pro Shops store.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.