Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

This massive airship factory is so large that it has its own indoor weather.

The spectacular collection of one of the world's best woodcarvers.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Visit the monolithic tomb of America's most famous general.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This secret gem of a toy store houses a rideable carousel populated with fantasy animals.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The whole world in one water tank.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The trials and tribulations of marking Poe's grave.

The world's oldest and largest museum of mass transit vehicles.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

The farm toy capital of the world hosts a museum filled with toy tractors dating back to the late 1800s.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

Low-frequency noise compared to an idling train can only be heard by some of this industrial town's residents.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.