This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

The one-time office of the architectural firm that ushered in the Gilded Age is now a Club Monaco.

The former hotel where Tesla invented the radio.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

There are owls with glowing eyes in Herald Square.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

This study room in the New York Public Library saw the creation of one of contemporary America's greatest traitors.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Commemorating the spot where the famous scientist fed his pigeons.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

Dedicated to a U.S. Army lieutenant colonel who was also a bird watcher and artist.

John Tyler never got to be buried at his beloved home, but every pet his family owned since has been.

The resting place of a Civil War celebrity's amputated limb.

This plaque celebrates the sister city relationship between Fredricksburg and Fréjus.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

The last vestige of a once substantial orchard and farm in the suburbs of Northern Virginia.

The longest-covered bridge in the state of Maryland.

A rural colonial settlement that contains the remains of a store and cooper.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

A New Jersey state park that was once Napoleon's brother's sprawling estate.

Nassau Hall has served as army barracks, a museum, and played a key role in the American Revolution.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.