What is it about mushrooms that makes people wish they lived inside of them?

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

One of Cincinnati's greatest fighters once trained at a now defunct gym in this Over-The-Rhine neighborhood.

Where beautiful signs live on forever.

Bison, America's national mammal, are staging a slow comeback in Ohio's prairie parkland.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A display of magnificent stained glass windows is the first exhibit of its kind.

What may be America's largest classic video game arcade lurks inconspicuously in a Chicago suburb.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

This unassuming passageway played a key role in one of the most important events in U.S. history.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The rogue roots are gradually consuming some of the historic marble grave markers.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

A castle built by an eccentric medieval enthusiast in rural Ohio.

This small plaza encourages people diagnosed with cancer to never give up hope.

Just outside the Ohio Supreme Court sits a testament to justice.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.