This is Walden Pond as it looks now-you can tell it's not Thoreau's time because of the buoys and the little visitors guidepost and the beach.
Because Thoreau loved the pond so, and people listened, Walden Pond has not been trashed. It is well cared for.
The presence of clear water usually lifts the spirits, whether it's a river, a waterfall, a lake or the sea.