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

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

A bit of retro transportation flair preserved in the world's largest department store.

NYC's legendary underground network for bovine transportation.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

A whimsical, but often overlooked clock in Park Avenue.

The former hotel where Tesla invented the radio.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

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

Peek through the gates at this oasis from the city, full of Old English charm.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A semi-scholarly approach to sex.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Try not to get slimed in Tribeca.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A butcher shop in Minneapolis has all the meats and cheeses you’d expect from any of its kind—except that all the products are vegan.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

One of the last functioning antique elevators in Chicago.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.