In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

“Invented in Key West, Perfected in Brooklyn."

An essential stop before plundering, BYO Cutlass.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

It is locally loved and ridiculed for literally looking like poop.

One of the largest Marian shrines on the West Coast stands rather unexpectedly in Silicon Valley.

A popular tourist cave with a dark past.

The unbelievably opulent home built for an infamous newspaperman.

On the Hudson resides one of the largest clocks in the world.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Headquarters of the world's fourth largest Hasidic sect and the first of many "770s" around the world.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

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."

The mass grave of a heroic Revolutionary War regiment sits below an empty lot near the Gowanus Canal.

A reminder to choose water over wine since 1888.

The world's largest collection of materials relating to lesbian history is housed in a Brooklyn townhouse.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.