for the Meiringen mentioned earlier -
the statue of Sherlock Holmes in the centre
Reichenbach Falls mentioned in Sherlock Holmes' greatest battle to the death - this is the real deal. From the station you can hike up the steep cliff to the top where the significant waterfall starts, ride a Postbus to above, or take the ancient funicular about 2/3 of the way up. Easy walk from the station and the town centre to the base of the waterfall.
Aareschlucht - the Aare river runs through this narrow gorge, you can hike through or catch a train from near the station to get to the other end.
And a lovely town and stop on the train between Interlaken Ost and Luzern via the Brünig Pass on the very scenic cogwheel train.