If Heidi were alive today, she would be astonished at what her beloved Alpine pastures have become. They still exist, but they are laced with trails filled with hikers, and divided up into grazing areas for the cows which seem to dominate the area. But I do love the sound of their bells.
You may have to adjust your expectations. Wengen is a fine village, and a good choice for being up in the mountains with spectacular views. There is great food on offer in the village, especially at our favorite hotel Bären. If they have a solo room available, they will take good care of you. If that is not available,,there are other excellent hotels nearby. Most guests take half-board at their hotel, and the food is very good, and usually made with local ingredients.
But there is no lake nearby, and for that you would have to take the trains down to Lauterbrunnen and on to Interlaken, or beyond to Thun or Brienz for your boat ride or walk along the lake.
As for lakes, I am afraid Luzern is not what you are seeking, if I understand you correctly. Luzern is a city, one situated by a lake to be sure, but it is full of traffic and crowded with tourists. Many of them. There is no serenity there. The lake is not that lovely turquoise blue of a glacial lake. And while we have tried to find a pleasant place to stroll along the lakeshore there, and maybe take a swim, or even just sit and look at the lake, that quest has totally eluded us. Most of the lakeshore is crowded with boat docks. There are a couple of small pocket parks tucked in between all the boat docks, but they are not particularly pretty, or quiet.
When we want to be near Luzern but enjoy the lake, we stay in Weggis, a boat ride away, at a nice little lakeside hotel with lakeview rooms. The mountain known as Rigi rises above the town, and you can ride a cablecar from Weggis up,to Rigi Kaltbad, with easy trails that traverse the mountainside, as well as ones that ascend to the top. One can walk out from the village and find cows and peace and quiet. In Weggis itself, I have not yet found any pleasant lakeside strolling.
A place you might consider for a lake venue is the village of Iseltwald, on Lake Brienz not far from Interlaken. This is a glacier-fed lake which can take on that beautiful color.
https://www.myswitzerland.com/en-us/destinations/iseltwald/
But I will caution that I have read recently, in an article about the problems with over-tourism in Switzerland, that Iseltwald has become yet another victim of Instagram fame, thanks to the series “Crash Landing on You” which was partially filmed in and around Iseltwald.
I wish I could recommend beautiful Oeschinensee, where we have spent a number of nights in the rustic mountain inn by the lake.
https://www.oeschinensee.ch/en/
But the inn closed to overnight guests after the 2022 summer season, due to what the innkeeper described as a “toxic environment” created by too many “entitled” and demanding visitors who had no respect for the place and the people who lived and worked there. It is a shame, because we really loved that place for an overnight in the mountains. The restaurant is still open, however.
I apologize if this sounds negative. I don’t mean to discourage you, but just to warn you that Swiss tourism has changed since the pandemic. Had we not been going there for 25 years, we would not have known the difference. But we have, and we do notice. Wengen and Mürren have changed little, perhaps due to local restrictions on development. But places where cars and tour buses can go, like Luzern and Lauterbrunnen, feel overrun to me.
