Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Compensation for the destruction of a historic shipyard.

The only subway station in the city that still makes use of gap fillers.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

The ballpark in "Pigtown" where the Brooklyn Dodgers made their name was replaced with a huge apartment complex.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

The highest rapid transit station in the world.

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

This metal eagle one of the final remnants of a newspaper that wanted to keep Brooklyn to Brooklyn.

In 1986, Keith Haring was arrested for painting this anti-drug mural on a Harlem handball court.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

New York's oldest concrete structure is being preserved thanks to the gentrification of Whole Foods.

A community farm in the midst of the Brooklyn concrete.

Two monstrous warehouses. One now holds priceless works of art, the other stands abandoned and dilapidated.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

While it now takes more than a dime to open an account this historic Brooklyn bank still displays the opulence of the gilded age in which it was built.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

An aptly-named street near the birthplace of the modern LGBT rights movement.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

One of the deadliest American air disasters is nearly forgotten in Brooklyn.