An out-of-service tunnel and nearby remembrances recall the location of a deadly train crash in the New York City subway.

One New Hampshire alleyway has become home to a public gallery of feline art.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

The colonial home of Paul Revere during the American Revolution.

The site of Paul Revere's historic two lantern warning.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

This historic patch of real estate offers a glimpse of colonial Boston.

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

Vermont's hills are alive with the sound of music at this historic hotel.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

Cryptid lake monster honored with its own monument.

Scary metal statues adorn some of the signature buildings of Burlington, Vermont.

This rail trail culminates in a three-mile land bridge only accessible to cyclists and pedestrians.

Driftwood dinosaurs lurk within trees covered in a rainbow array of avian abodes.

Pluto is still considered a planet in Ithaca, New York.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

There aren't too many operational funiculars around, but Pittsburgh has two!