The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

This abandoned subway station can still be seen on regular commuter trips.

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

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The "Seinfeld" diner.

A dilapidated dock tells the story of Titanic's missed arrival.

A semi-scholarly approach to sex.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

In use from 1742 to 1910, only flat headstones were allowed in this cemetery.

The final resting place of the Hollywood star who came to a tragic end.

Records of the dead describe the myriad odd ways people used to die.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

This hidden jockey “walk of fame” celebrates the winning riders of the Kentucky Derby.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The last standing piece of a famous Honolulu landmark.

One of the oldest, tallest, and most haunted lighthouses in America.