Be sure to have a full tank of gas, because Ayutthaya is worth making a detour for. Located 35 miles from Ongkharak, it has a few fabulous attractions, such as Ayutthaya Historical Park and Wat Phra Si Sanphet. Nothing says living it up like a road trip does, so keep on cruising to Bangkok. It’s 40 miles away and also has a few worthwhile sights, such as Khaosan Road and Pratunam Market.