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

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

A hip bar decorated with walls of golden skulls.

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.

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

A miniature rainforest is growing inside of a Midtown Manhattan office building.

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

Try not to get slimed in Tribeca.

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

New York's oldest magic store.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A terrific purveyor of natural history objects and curios.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

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

A constellation of golden cobblestones shows the names of local children born under a full moon.

The World Wide Web was created in this nondescript corridor at CERN.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

Video games, body language, and postal history are all on display in this Swiss museum.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

This long line of cement defensive wedges is named after the famous chocolate bar for obvious reasons.

Enormous, fluffy dogs frolic around this museum dedicated to a legendary Saint Bernard.

The last woman executed for witchcraft in Europe is remembered in this Swiss museum.