Two thousand artifacts from around the world collected by one woman who loved to travel.

An annual extravaganza of Broadway theater memorabilia.

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

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

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Yo, Adrian!

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

This elaborate towering structure was once famed for its revolutionary height.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Huge masonic hall in Philadelphia with lavishly themed rooms.

A layered tribute to the work of mosaicist Isaiah Zagar.

In which a local geological marvel becomes a quaint roadside attraction.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The first of Lancaster's "rural cemeteries."

The oldest farmer's market in America is so ancient it was approved by the King of England.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

The site of the deadly Triangle Shirtwaist Factory Fire.