Interlaken sits between the Brienzersee and the Thunersee (lake Brienz and Lake Thun). Interlaken is part of the Canton of Bern and the most popular base for exploring the Berner Alpen.  Interlaken sits in glorious country and there is no shortage of explorations awaiting you.  If you do not feel like hiking, then consider sightseeing along the lake on one of the many cruises available.  For more information, see Interlaken's official tourism website.3

Interlaken has many attractions.  Lakes or mountains?  Why not both?