To the east of Interlaken lies Lake Brienz, known for its turquoise waters and mountain vistas. Steamboats have been operating on this lake since the 1830s, and today, a fleet of five early 20th-century vessels offers scenic cruises. The Giessbach Falls, cascading over 500 meters into the lake, are a notable attraction accessible via boat and a historic funicular railway.
Outdoor enthusiasts can engage in kayaking, stand-up paddleboarding, and swimming in the clear waters. The Brienz Rothorn Railway provides a nostalgic steam-powered journey to the summit of Brienzer Rothorn, offering panoramic vistas of the region. Access to Lake Brienz is convenient. From Interlaken, visitors can reach the lake by train, boat, or car. Regular train services connect Interlaken Ost to the town of Brienz, situated on the lake's eastern shore. Boat services operate between Interlaken and Brienz, providing a scenic alternative to rail travel. For those driving, well-maintained roads offer easy access to various points around the lake.