The rapids sit inside Kruununpuisto, Crown Park, the oldest nature reserve in Finland, established in 1842. Paths wind along both sides of the rapid's banks past rock carvings left by 19th-century visitors and unique river potholes. The grand castle-like building above is Imatran Valtionhotelli, built in 1903 in Art Nouveau style and still operating as a hotel today.
For the rest of the day, head to Vuoksen Kalastuspuisto, the Vuoksi Fishing Park, set on Varpasaari about ten minutes from the rapids. The park sits on the banks of the river Vuoksi and is a relaxed, all-in-one spot: an angling pool stocked with salmon where you can fish with rented gear and have your catch smoked or filleted on site, plus rowing boats, SUP boards, bike rental, minigolf, a riverside sauna, and the café-restaurant on a sunny terrace over the river.
If you'd rather be on the lake, Saunaboat m/s Emma offers a range of charter cruises from Imatra passenger harbour. Built in 1908 and later converted for recreational use, Emma runs scenic loops, half-day trips to nearby islands and longer cruises that include a wood-fired sauna and a swim, with the chance to spot Saimaa ringed seals along the way. Charter ahead, as Emma works on a booking basis rather than scheduled departures.
For places to stay the night in this region, visit Gosaimaa.com. You'll find a comprehensive list of hotels, cottages, holiday homes, farm stays, camping sites and many more to choose from.