This plaque marks the spot where the first crossing guards helped get kids safely to school.

A giant granite cross remembers missionary Father Frederic Baraga, and his safe passage across an angry Lake Superior.

Home to part of the world’s largest private collection of original manuscripts and documents.

Minnesota's oldest and deepest mine is now an underground physics laboratory.

A warehouse for all of your architectural details.

Elaborate drama imparts an appreciation for 19th century hardships.

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

The oldest university museum west of the Mississippi retains its 19th century feel.

The famous aviator's final resting place is a study in natural beauty.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

A model of a galactic embassy is hidden in plain sight along the highway, proposed by a UFO religion to find the aliens that created life on Earth.

A reminder to choose water over wine since 1888.

A young woman's senseless murder led to the controversial psychological theory of the "bystander effect."

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

An abandoned subway tunnel that could have reinvigorated Staten Island still lies somewhere beneath this Brooklyn park.

New York City's only radical feminist independent bookstore.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.