For a day by the water with a difference, plan an excursion to the bubbling pools of Umpqua Hot Springs. This place is known for its mineral-rich waters.
You're spoiled for sightseeing choice in Idleyld Park. Umpqua Hot Springs is an ideal place to start here, but there are lots of other worthy sights to visit. Toketee Falls, and Watson Falls are near the naturally heated water source and will top off your day nicely.