Phil Mortillaro uses keys to bring art back to the Village.

The site of the deadly Triangle Shirtwaist Factory Fire.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.

A replica of a 7th-century church hides in plain sight in the middle of the concrete jungle.

The first piece of public art dedicated to LGBT rights.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

This sprawling, formerly elite sporting complex in Amman, Jordan has become a local picnic spot.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

Dr Barnes' $25 billion private collection of art and arboretum.

Go inside to really appreciate this 500-year-old technological masterpiece.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.