Possible relics of the ancient Roman city are hidden in this restaurant's façade.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

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

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

The most confusing clock in New York.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

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

Mysterious 500-year-old tapestries depict a unicorn hunt.

Tucked in the back of this amazing antique store is an important piece of medical history.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A layered tribute to the work of mosaicist Isaiah Zagar.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The "Seinfeld" diner.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

There must be a pun in this haystack somewhere...

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

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