Though it may look like it’s missing its outer shell, this skeletal cast-iron tower was built to withstand wind and waves.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

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

The 28-foot granite map plots the locations of 40 theaters in New York City.

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

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

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.

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

NYC's legendary underground network for bovine transportation.

A garment factory hides a small Dominican eatery in the hallway to its freight elevator.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

This semi-hidden Manhattan restaurant is based out of a loading dock.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

The most confusing clock in New York.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The home of the first American-born saint is one of the only curved buildings in New York.

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

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

On the Hudson resides one of the largest clocks in the world.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

Seven people are buried in the middle of what's now a movie theater parking lot.

These lush botanical gardens employ the most purrfect pest control force.

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.