This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

A tribute to the students and teachers who lost their lives during the 2012 shooting at Sandy Hook Elementary School.

This historic railway museum may have lost its passengers but not its love for trains.

Star-spangled and 38 feet tall.

A statue commemorating a 16-year old girl's nighttime ride to raise a militia against attacking British troops.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

After the comedian dissed a Connecticut town on his show, they named a sewage treatment plant after him.

The Teenage Mutant Ninja Turtles stop thieves at the site of a historic 1876 bank robbery.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

This hidden labyrinth offers walkers some brief peace of mind.

Dozens of bronze glove sculptures symbolizing loss and life decorate a busy Cambridge subway station

A home decorated by its owner with eye-catching and captivating assemblages of found objects

Millions of numbers carved in glass represent the tattoos forced upon victims.

This steep slide at a kids’ playground went viral after an police officer tumbled down it.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This bronze sculpture was inspired by a photograph of Martin Luther King Jr. and his wife embracing after he won the Nobel Peace Prize.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.