A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

After surviving abandonment, this powerful Latin American mural is alive again.

The notorious headquarters of a corrupt political machine.

Nope, not Washington Irving's house.

The most confusing clock in New York.

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

A posh members-only club with a literally dramatic history.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

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

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

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

A whimsical, but often overlooked clock in Park Avenue.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

The only remaining building in New York to see the inauguration of a president is being slowly overtaken by a grocery store.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

A small part of lower Manhattan is actually made from a bit of England.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

This huge work of functional public art replaced a landfill in New Jersey's Meadowlands.

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

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

It looks like a whale, it's part of Yale, and it's best-known by a nickname you can probably work out for yourself.