Ah, a vacation at the lake. It sounds like the perfect retreat. But, if you like a bit of romantic atmosphere, spooky lingering fog, stomping monsters in the woods, strange lights, a lake vacation can be so much more than a paddle boat and some Smores.
If you're looking for UFOs, pick a lake away from big city lights.
If you're looking to have a Bigfoot encounter, pick a higher elevation wooded area lake.
If you're looking for a cursed lake, do a google search for a prospective lake and the word "haunted."