Don't wear anything you're not prepared to lose—these macaques will snatch your sunglasses or snacks in seconds. Head straight to the 13th-century Prang Sam Yot ruins to see the Khmer-style towers crawling with monkeys. You only need about an hour here before the heat and the chaos get intense. Most people bundle this with an Ayutthaya day trip from Bangkok; it's the perfect way to see the 'Monkey Temple' without dealing with a sketchy local train.
