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

This cemetery features modernist statues as strange as its name.

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.

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

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

Unrepaired walls from a 1920 anarchist bomb attack.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

An accidentally hidden library containing the ephemeral history of New York.

Once a dumping spot, now a park with a kayak launch.

The factory for the popular Dumbo location, the Greenpoint shop is a quiet gem.

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

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

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

At 207 feet, one of the world's longest continuous escalators.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

D.C. once had its own tiny rival to the New York Stock Exchange.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.