This wildflower meadow was once the site of America's oldest operating paper mill and a symbol of Newark's manufacturing past.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

In Wilmington's hip Trolley Square neighborhood, a utility box has been repainted to resemble a classic gumball machine.

The only labyrinth within the city of Alexandria.

Ruins from the Parthenon and petrified wood line the interior of one of the world's most famous monuments.

Garments from across the globe call this hidden gem home.

The hippo that stands on this university campus was once a drunken flea market purchase.

One of the few remnants of an extensive tram network that once made Buenos Aires the “City of Trams.”

A massive line that stretches across the floor of Bologna’s largest church was created by a 17th-century scientist to measure the movements of the Sun.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

A giant statue of the Buddhist goddess of mercy watches over the town of Ōfuna.

Japan's first train station is also the site of Godzilla's first destructive visit to the nation.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.

Erected in memory of Sir Arthur Conan Doyle, who was born close to this spot, this statue commemorates the author and his famous detective.

An exceptional engineering feat that facilitates the migration of salmon upstream during their breeding season.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

Lines on the pillar of Heidelberg's Karl-Theodor Bridge record the dramatic heights of past floods.

The last place in Bahrain where you can get a custom-made dhow.

These purpose-built WWII air raid shelters, which run half a kilometer under the town of Mellieħa, are among the longest in Malta.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

The southernmost postal office in South America.

Royals, rebels, and artists have all conversed at this grand 19th-century Viennese coffee house.

These bronze horses on the gates of the Royal Palace of Naples were a gift from a Russian tsar.