Kalutara sits where the Kalu Ganga river meets the sea, best known for the gleaming white Kalutara Bodhiya stupa that every southbound vehicle passes. Beyond the temple, it's a quieter, less-touristed beach stop with mangrove river trips and rubber and coconut plantations inland.
A large hollow dagoba you can walk inside, with a painted interior gallery depicting scenes from the Buddha's life.
Boat rides upriver pass mangroves, cinnamon plantations and small fishing villages away from the coastal crowds.
A restored early-1900s colonial mansion just inland, built by a wealthy local landowner in Edwardian style.
Kalutara pairs well with the Ayurvedic wellness and cinnamon peeling experience, or a short hop south to Bentota.