The miraculous hydrant that saved the Mission District in 1906.

A museum befitting the city responsible for supplying the majority of the world's LSD.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

A steampunk wonderland that preserves America's history of industrial innovation.

A mysterious stone embedded at the base of a historic Boston building.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

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

One of America's most historic homes also holds a startling literary legacy.

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

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

An enormous, inside-out glass globe built in 1935.

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

Historic Hull Street was actually the first street with a proper name in the Boston area.

Tragedy on Little Brewster Island memorialized.

The first bell ever cast in Boston was cast by Paul Revere...and sounded terrible.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A celebration of capitalism in Midtown.

Bowl in splendor, if you're lucky.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.