Kratie is a quiet provincial town on the upper Mekong, roughly halfway between Phnom Penh and the Laos border. Most travellers stop here for one reason: the Irrawaddy dolphins. A small, critically endangered freshwater population survives in the deep pools at Kampi, about 15km north, and watching them surface in the brown river light is genuinely memorable.
Beyond the dolphins, Kratie rewards a slow morning. The riverside market is lively and good — frogs, freshly grilled corn cakes, pork buns for a few cents — and the French colonial shophouses along the riverfront give the town a pleasant, unhurried character. Wat Roka Kandal is the most atmospheric of the local temples. The island of Koh Trong, a short ferry ride across the river, offers an easy half-day of cycling through orchards and Cham villages.
A word of caution: negotiate clearly with moto drivers before setting off for Kampi. Some add charges for rapids and temple visits that weren't mentioned upfront. Agree on everything before you go.