Rauðauga park in Iceland is a hidden gem that will give you serious Lord of the Rings vibes. With its stunning red waterfalls and crystal-clear pool at Rauðauga. It's about a 2h return hike from the parking spot. The red waterfall is halfway and from there you can choose to follow the red river up to it's source, the red eye. It looks really good both on drone and camera from the ground.