Two thousand artifacts from around the world collected by one woman who loved to travel.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

An enormous, inside-out glass globe built in 1935.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

A mysterious stone embedded at the base of a historic Boston building.

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

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.

The former locus of Boston's high culture has been shuttered and buried for over 70 years.

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

Electrical pylon in the shape of Disney's beloved mouse.

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

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

A crumbling hospital from the 1850s on Roosevelt Island.

Site of the first pathological and bacteriological research facility in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

New York's oldest and possibly grandest keeper of books.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

A Yiddish theater turned movie house turned rock and roll landmark turned gay disco turned bank.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

This Upper East Side apartment co-op was designed as a tuberculosis sanitarium.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

This nearly invisible wire transforms much of the city into one big, symbolic home on the holy day.