Visit a church sculpted from hardened lava.

Home of a French nobleman's short-lived attempt at raising cattle in the Badlands of North Dakota.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

Despite monuments in other locations, this spot in a South Dakota field is recognized by the U.S. National Geodetic Survey as the center of the 50 states.

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

The legendary court where emerging basketball players gain their street cred.

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

A semi-scholarly approach to sex.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

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

There must be a pun in this haystack somewhere...

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

The site of the deadly Triangle Shirtwaist Factory Fire.

The notorious headquarters of a corrupt political machine.

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

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

A bit of retro transportation flair preserved in the world's largest department store.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

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

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

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

Commemorating the spot where the famous scientist fed his pigeons.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.