Headquartered at Lethe Estate, this outfit offers tranquil one-hour river trips on the Great River from Lethe. You’re piloted 3km downstream along the muddy river aboard long, narrow bamboo rafts poled by an expert rafter, who waxes poetic about the birds, flora and fauna as you glide along. For an extra US$15 per person you’ll get lunch and a plantation tour. If you show up under your own steam, you’ll pay US$50 for the raft trip alone.