Halloween is one of the most popular holidays in the United States (Credit: The B's/CC0/Flickr)

Few countries celebrate Halloween with as much fervor and excitement as the US. Children and adults alike observe the occasion by dressing in creative costumes, gorging on candy, and decorating homes and front yards with spooky skeletons and jack-o’-lanterns. Meanwhile, enterprising entrepreneurs cash in on the holiday with creative haunted houses, corn mazes, and hayrides. So, how did all the fun customs come about? Read on: