1. Lake Thun (Thunersee) is a crystal clear alpine lake located in the Interlaken region of Switzerland. It is approximately 17 km long and 3 km wide, with a maximum depth of 217 meters. The lake offers breathtaking views of the surrounding mountain ranges and is a popular spot for boating, swimming, and water sports. In addition to its natural beauty, Lake Thun also has historical significance as it played a strategic role in several battles during the Napoleonic Wars.

2. Lake Thun is a natural attraction and can be visited at any time. There are several boat tours available that depart throughout the day. For more information, you can contact the Interlaken Tourism Office at +41 33 826 53 00.

3. Ticket prices for boat tours vary depending on the tour duration and itinerary. A basic roundtrip ticket for a one-hour tour starts at CHF 32 for adults and CHF 16 for children. There are also combination tickets available that include a lake cruise and a visit to nearby attractions such as Thun Castle or the St. Beatus Caves. Public transportation options to Lake Thun include train (Interlaken Ost station) or bus (Bus No. 21) from Interlaken.