The remains of a massive blast furnace in what was once one of the country's largest iron-producing regions.

Some say that the battle fought at this Kansas site in 1856 was the first unofficial battle of the American Civil War.

A memorial honoring those who perished in one of the worst construction disasters in U.S. history.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

The site of the one and only battle of Lord Dunmore's War.

Once home to a thriving oil industry, this town now sits eerily abandoned.

The crumbling remains of the first Black-owned and operated hospital in Kansas City.

The mounds at this site were reconstructed with the help of archaeologists and historians.

A 2,000-year-old Adena burial mound located along a busy street in Columbus, Ohio.

This park pays homage to the region's rich industrial history of brick making.

The site of the worst mining disaster in Ohio's history.

An abandoned asylum incorporated into a college campus.

The world's largest rotating world.

One of the largest underground systems runs under Canada's largest urban center.

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.

A Swedish farm is the world's only producer of the rare, creamy delicacy that is moose cheese.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

This abandoned mine offers a glimpse at what life was like for those who came to Alaska seeking Gold Rush riches.

This outdoor exhibit features a historic wooden dam once used to help boats navigate the Ohio River.

This 41,000-acre wetland complex is the largest marsh in the interior of the United States.

Also known as the Cathedral of the Plains, this church holds the distinction of being one of the "8 Wonders of Kansas."

The headquarters of a pioneering cast iron and cast aluminum cookware company is in ruins, but still standing.

A remarkably opulent mansion with a tragic history.