Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

This forlorn park is the result of a failed investment turned tax dodge.

This ancient Hawaiian henge may have been an early star chart.

This black shoreline is made up of exploded lava particles.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

Race through the maze, get your name on the sign.

The inventor of the Coney Island hot dog rests in a grand mausoleum in Brooklyn.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

Destruction from Armenia's 1988 earthquake inspired an artist's sculptures of scrap metal.

Final resting place of the immigrant who brought artificial seltzer water to America.

A way to take your secrets to someone else's grave.

A mass grave for victims of one of the city’s worst fires.

A curious friendship between two inanimate ladies.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

The unassuming structure was part of a Major League Baseball stadium.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.

This elaborate towering structure was once famed for its revolutionary height.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Yo, Adrian!