Visit the monolithic tomb of America's most famous general.

This diesel train serviced the Brooklyn waterfront for more than three decades.

These ancient ruins hide in plain sight next to a dessert shop.

An important example of architectural history slowly decays in the city center.

Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Where commuters walk through remnants of an ancient Greek necropolis.

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.

Stockholm's deepest subway station is also a stunning ecological wonder.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

A heated statue pays tribute to one of Sweden's great actresses.

A concrete mushroom that divided Stockholm residents for nearly a century.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A very classy 1920s-era bar right in Grand Central Station.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

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

The lesser-known Alice sculpture of Central Park dedicated to the “godmother of American children.”

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Discover the taste of mold.