The last remaining vestige of a popular 1999 public art display.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

A very classy 1920s-era bar right in Grand Central Station.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Commemorating the spot where the famous scientist fed his pigeons.

There must be a pun in this haystack somewhere...

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

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

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

Final resting place of the author who wrote the ghost story "The Turn of the Screw," and his brother, the Harvard doctor and paranormal investigator.

The mystic whose incorrupt corpse still attracts the faithful.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

For one of Rome’s finest renditions of cacio e pepe, head straight to this osteria.

Breathtaking and huge 430 year old maps of Italy.

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

The Avenue of Mausolea is a series of grand palatial tombs.

Try the alligator at this fondue spot, which has been catering to "lovers and hedonists" since 1967.

The oldest natural history museum in western Canada houses more than 5,000 vintage botanical and zoological specimens.