In reply to Fredt:
Schynigge-Platte to First is a straightforward but very spectacular walk timed at about 6 hrs with amazing views of the Wetterhorn, Schreckhorn, Eiger towards the end.
From Meiringen you can walk up to the Reichenbach Falls where Moriarty and Holmes fought and fell and from then up to Rosenlaui and Grosse Scheidegg, quite a lot of ascent but you can use the post bus to shorten it
There is also a Sherlock Holmes Museum in Meiringen
From Lauterbrunnen you can get to Murren and then walk up the Schilthorn which can be a tiny bit scrambly as you approach Blofeld's Piz Gloria, but look out for henchmen in orange jackets and black trousers.
And the klettersteig already mentioned. Have done Schwarzhorn which was straight forward but not the Rotstock though I went up the glaciated slabs to it from the Eigergletscher side. (below the W Flank)
Post edited at 09:09