Underground vaults of a former brewery beneath Brooklyn's Crown Heights are now used to ripen cheese.

Dedicated to preserving the history of free Black communities in Brooklyn and beyond.

At this rare mosque in Tbilisi, Sunni and Shia Muslims pray side by side.

A semi-scholarly approach to sex.

Nope, not Washington Irving's house.

The notorious headquarters of a corrupt political machine.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

One kilometer of thick brass rod laid out before your eyes.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

Plot your trip through the city on the sidewalk.

Walk over a 150 year old manhole.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

This historic Boston building has gone from personal estate to porn theater and back again.

Dim sum, served in a grand old theater.

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

The Boston square dedicated to the dark poet who was born nearby.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

A men’s restroom became a sandwich shop.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.