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

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.

All that's left of the quintessential "cabin in the woods."

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

One of only two commuter aerial tramways in the United States.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

The former hotel where Tesla invented the radio.

Commemorating the spot where the famous scientist fed his pigeons.

A celebration of capitalism in Midtown.

A dilapidated dock tells the story of Titanic's missed arrival.

More gold than anywhere else, ever.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

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

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.