Surfing in Switzerland? One medieval town has waves, castles, and barely any tourists.

• Thun, Switzerland, is a hidden gem offering picturesque views and fewer tourist crowds. • Thun's medieval charm, castles, and natural views make it a standout destination. • This article is part of "Undiscovered Europe," a series exploring overlooked travel gems.

Living near the "completely touristy" resort town of Interlaken, Switzerland, travel blogger Jana Aplin often takes her out-of-town guests to the lesser-visited lakeside town of Thun.

Nestled between Bern and the Bernese Alps, the town sits on the northern tip of Lake Thun. Divided by a crystal blue river with a mountain backdrop, Thun is a picturesque, hidden-gem destination worth visiting, Aplin told Business Insider.

"In general, Thun is not that well known to many tourists, and we regularly recommend it to our visitor