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

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The former hotel where Tesla invented the radio.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Avoid gangster interaction while window-shopping.

Visit the monolithic tomb of America's most famous general.

Try not to get slimed in Tribeca.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

These ornate manhole covers were used for a now-forgotten purpose.

The home of the first American-born saint is one of the only curved buildings in New York.

Red frames showcase remnants of one of New York's original subway stations.

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

A sculptural commentary on capitalism pokes up from the East River.

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

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

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.