The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

There must be a pun in this haystack somewhere...

The most confusing clock in New York.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

A whimsical, but often overlooked clock in Park Avenue.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

Avoid gangster interaction while window-shopping.

An artist's cute bronze subway sculptures belie his violent artistic past.

The "Seinfeld" diner.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

Lie in a hammock where George Washington stood.

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

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.