A monument stands at one of the starting lines of the Trans-Canada Highway, formerly the longest uninterrupted highway in the world.

Greenery cloaks this serene sculpture inspired by the famous Lost Gardens of Heligan.

100 massive sculptures in the Hudson River Valley.

Home of Philip Johnson, one of the 20th century's most influential architects.

The famous author's cottage hideaway.

The first "Hall of Fame" in America was designed by legendary Gilded Age architect Stanford White for what was then the NYU uptown campus.

Three stories above you, your salad is being grown.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Ruins of a Carnegie family mansion on Cumberland Island.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

A building so large that it has its own weather.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

Where NASA's satellites and rovers phone home.

NASA's leading space science lab started by a co-founder with deep ties to the occult.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

A hidden "place of interment for gentlemen."

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

A cargo of beautiful music.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).