Overtourism in Venice is getting so bad that city officials are putting a cap on tourist groups.Joey Hadden/Business InsiderVenice's tax pilot program to combat overtourism didn't deter enough travelers.The tax raised $2.2 million over two months as tourists continued to pour in.Venice recently set a 25-person cap on tourist groups and banned loudspeakers for tours.Tourists in Venice stuff themselves through narrow bridges in mobs.