Thun is the very heart of the Bernese Oberland. This Swiss town on the lake of the same name is charming and down-to-earth – and the majestic alpine trio of the Eiger, Mönch and Jungfrau is always on the horizon. Thun's Old Town is home to some unique architectural gems, delightful boutiques, chic shops and bars with a great atmosphere. It's a lovely place to stroll about in and relax. Above it all, like the cherry on a cake, towers the mighty Thun Castle, the city's trademark. It's as if this magnificent scenery was specially created to be the setting for a first-class event such as IRONMAN Switzerland in Thun.