Dornsee is a panoramic lake with a height of 4,600 feet with a charming mountain backdrop, and also nicknamed "Andrew Lake." The Vance Sens Prague Natural Park is located on the western bank of it, and is characterized by its turquoise color, which is one of the main reasons why it is a popular destination for many locals. It is also strange that the lake water is relatively warm as it contains only a few tributaries and there are no external flows.