"Luxury hotels line the waterfront of Lake Wörthersee, but none have a swimming pool as remarkable as the one at Hotel Schloss Seefels. Accessible via a wooden dock that juts out into the turquoise lake, the pool is sometimes referred to as a bottomless bathtub — it’s enclosed only on the sides, and is heated in cooler weather, making it possible to dip in the Wörthersee’s waters during all four seasons." - Tablet Hotels