A relic of the Cold War in Chicago.

First planned industrial community in the United States.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

A medical facility that has been kept frozen in time.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

This library and museum is dedicated to the life and literature of the Indianapolis native author.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

The largest historic preservation organization in the United States.

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.

A modern-day wunderkammer dedicated to Indianapolis history, Afrofuturism, and musical vibrations.

The world's largest rotating world.

Abandoned Italianate architecture on the coast of Maine.

Explore the dark underground corridors of this graffiti-covered former military fortification.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

The only remaining historic maritime signal station in the United States.

Teddy Roosevelt’s famous “midnight ride to the presidency" started at this small lake high up in the Adirondacks.

Why have you never heard of the second most popular tourist site in New York?

This rare symbol of Eastern philosophy in the West has been created over years of painstaking construction by the local community.

The first keystone arch railroad bridges constructed in America.