Sniff the Titan Arum's rotting flesh.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The "Seinfeld" diner.

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

Ride the subways of yesteryear.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A hip bar decorated with walls of golden skulls.

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

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A semi-scholarly approach to sex.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

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

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

India's first open-air public art district sits in the heart of the country's capital.

The former Willingdon Airport started operations in 1929, in India's capital, Delhi. Now, it's used for maintenance runs and helicopter rides.

A 66-million-year-old rock formation stands tall over Mumbai, offering stellar city views.

Nineteen ancient rock-cut Buddhist caves can be found on the outskirts of Mumbai.