The Odeon of Herodotus Atticus in Athens, Greece Credit: Berthold Werner Wikipedia CC BY-SA 3.0 Athens has emerged as one of the most popular international destinations for American travelers over the upcoming U.S. Independence Day holiday. The ranking underscores the Greek capital’s growing momentum within the competitive U.S. tourism market. According to the latest data from AAA Travel, the full-service travel agency branch of the American Aut…