The "Seinfeld" diner.

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

One of the only single-person private gravesites in New York City.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

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

A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

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

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

The boulder on which Alexander Hamilton laid his head after a deadly duel can still be visited on the New Jersey coast.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

A whimsical monument deep in this park commemorates the groups that helped build it.

Cryptid lake monster honored with its own monument.

A New England curiosity cabinet, one hundred years on.

A small chapel celebrating the spiritual bond between dogs and humans.

The author's beautiful and historic home is also a fully functioning goat farm.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

Location of a reliquary containing bone fragments of 18 saints.

A monument celebrating the idea of reaching inaccessible places.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

Though illegal, city officials have made an exception for this work of art.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.