When ecosystems collide in the arid Southwest.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The largest source of fossilized insects anywhere.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

These pretty kitties killed and ate as many as 135 railway workers.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

Where animatronic singing fish go to retire.

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

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The rocks in this arid basin leave trails of movement behind them.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Electrical pylon in the shape of Disney's beloved mouse.

20,000 pieces in a Frank Gehry-designed building.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.