A 150-year-old steam locomotive crosses the southern half of the island daily.

The name Niarbyl means “the tail” and refers to the rocky formations that push out into the Irish Sea.

Mysterious chains and iron stakes adorn this strange grave, with no explanation.

This hidden bridge is where local children leave gifts and messages for the island's fay folk.

World's largest working waterwheel has been around for over 150 years.

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

The real-life site of Ichabod Crane's infamous gourd attack.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

The painter who popularized "bulls" and "bears" as symbols for the stock market didn't get a proper headstone for over a century.

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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

A whimsical, but often overlooked clock in Park Avenue.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

A small 19th-century graveyard tucked away in the middle of a suburban neighborhood.

This free, take-a-book shop seems like a trick but isn't.

The trials and tribulations of marking Poe's grave.

Eighteen miniature death-scene dioramas.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.