Today is Valentine's Day, a day set aside for romance and expressions of love and affection. The traditional western holiday has grown to be observed in many countries around the globe, despite some efforts to fight its adoption by religious and cultural groups. As couples exchange traditional gifts of flowers and chocolate, they fuel a robust industry in the United States, where Valentine's Day spending this year is expected to reach nearly $16 billion. Gathered here are images of this Valentine's Day from all around the world.