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

A celebration of capitalism in Midtown.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

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

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

Take a drunken tour inside the world's largest known geode.

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

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

Yo, Adrian!

These lush botanical gardens employ the most purrfect pest control force.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This ancient Egyptian obelisk still bears the wounds of World War I.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

An architectural oddity hides in plain sight on this iconic London bridge.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The taxidermied remains of a once-great parrot.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Two plaques commemorate the site of Shakespeare's first theatre.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

London's smallest police station is barely the size of a phone booth.

Eighty million natural history specimens call this gargantuan museum home.

An unusual round church in London with a Templar past.