Cryptic messages embedded in the New York City sidewalk.

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

The first and only carousel with a lineup entirely of insects.

This innocent-looking townhome is actually a subway exit.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Bowl in splendor, if you're lucky.

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

A natural gas leak provides a flickering flame beneath a waterfall.

A celebration of capitalism in Midtown.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Ride the subways of yesteryear.

Read a book next to a Midtown waterfall.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

This sprawling museum holds one man's giant collection of real tanks.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.