This incredible collection of vintage pinball machines can be played at 25 cents a pop.

A tiny slice shop hides down an unmarked hallway in a Las Vegas casino.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The 28-foot granite map plots the locations of 40 theaters in New York City.

More than 300,000 historical artifacts from the famous music venue, from Duke Ellington's handwritten score to The Beatles' booking slip.

Ice cream stand, snack bar, and time capsule of milk conveyance.

Interactive museum complete with costumed re-enactors and the only known surviving chest from the Boston Tea Party.

A pair of antique trolleys are on display at one of the oldest subway stations in the United States.

This mosaic commemorates the oldest subway tunnel and station in the United States.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

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

These items are all that remain from the room used by the author during his second tour of the U.S.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

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

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Dedicated to a colonial woman who was hanged for being a Quaker.

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

This stone tower was built to protect Crete from incoming pirates.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A home covered with elaborate mosaic and other pieces of art.