The remains of a 19th century spring, and the site of an infamous unsolved murder.

A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This stunning Connecticut mansion is actually just a one-room-deep hoax.

An abandoned gun-funded 19th century utopia.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

An easy-to-miss plaque marks the building that first held this 19th-century telephone innovation.

The oldest place in Hartford is a cemetery with thousands of bodies stacked beneath the grass.

A tiny memorial for the year the Connecticut River almost destroyed New England.

A beautiful oddities shop crammed with strange and morbid curiosities.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

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

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

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

Nothing says indulgence like a 1,500-pound chocolate castle.

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

This shrine dedicated to the Virgin Mary is also a tribute from a mother to her fallen son.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

This plaque marks a place where one of Hollywood’s most famous dancers got his start.

A private residence adorned with a gorgeous mural dedicated to the buzzing insect.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

This church in Pittsburgh is home to the largest collection of religious relics in North America.