The northernmost international land border crossing in the United States.

Some of the world's largest produce comes from a region not known for agriculture

This whimsical stacked cabin looks like something out of a children's book.

A trading post in the North Pole where children send letters.

Step inside one of America’s rare poteaux-en-terre French houses.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

Walk up a ramp through a forest for panoramic views of Lake Michigan.

A lovely hidden waterfall right off the highway is well worth a stop.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

A fitting attraction for the corn capital of the world.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

One of the first intercontinental ballistic missile sites in the United States.

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

A relic of roadside lore and perhaps the first of its kind in North America.

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

Every president in history is immortalized in bronze in downtown Rapid City.

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

One of the largest private collections of fossils in the world.

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

The first declared National Monument in the United States.

When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

America's largest man-made forest was planted in an effort to bring back the past.