Hi Niv -
I read two different objectives- at least, for me they are different -
1.- From your first post -
<<"1) Would it make sense to stay in Lorrach and visit the Cities in Switzerland? If yes then which cities would you suggest that I visit? 2) How many days would I need for each of the cities that you suggest and which is the best way to travel to them from Lorrach.">>
There is a strong emphasis on cities, and nothing else.
2.- From your later post -
<<"I'd like to let you know that my main interest is nature. I would love to get my fill off the breathtaking views that Switzerland is so famous for. The Swiss alps, the meadows, the pristine lakes, all of it. I'm not very athletic and hence hiking isn't my strong suit. As long as the trail isn't very challenging I can manage.">>
<<"I wouldn't mind visiting a few galleries and one or two interesting museums. To add variety to the whole trip.">>
I'll mention meseums first -
The major museums(plural) that are associated with cities in my mind...and, mind you , I have not checked the internet for lists... are Basel ( art), Zürich (history, art), Winterthur , east of Zürich (art), and Luzern ( art). There are many more.
In Basel - please walk 5-10 minutes from the main station to see the wonderful water-sculpture or fountain by Tingueley.-
www.basel.com/en/Media /Attractions/Sightseei ng/Tinguely-Fountain
Not your standard museum, but a piece of whimsical art you'll remember for a long time.
In Luzern, there are two good museums that are extremely convenient. Both emphasize Picasso. There is a small, very personalized one in the old city, and the other is the world class Rosengart Collection only 3 minutes fro Luzern main station. Lots of Picassos, and my favorite, over 100 Klees.
Those are places that I remeber with pleasure. Purely personal choices from many available.
Cities with Scenery -
The best way to experience the natural beauty is to get outside the
cites, or, visit one that has beautiful surroundings or beautiful sites
Basel, Bern and Zürich will not get you close to natural beauty, although Bern has an attractive site on the Aare and the old town is fun. I'd visit Bern as a day trip from either Interlaken or Luzern; save it for a cloudy day. Geneva is on a nice lake. Too far away, for your short time. Lucas also mentioned Montreux, which has high mountains and the lake.
In my personal opinion - not shared by everyone - the single nicest lake in Switzerland is Lake Lucerne. In German, der Vierwaldstättersee. I attached some pictures in a link above. This link following is about a hike there, but I'm not suggesting the hike,unless you find something that you really like. I'm giving the link because of the information and pictures in the thread, about the southern portion of Lake Lucerne.
Lakes Brienz and Lake Thun (both much smaller) have more spectacular nearby mountains, but Lake Lucerne has wonderful variety, mountains, villages, and access to various boat landings by train or bus as well as by boat. One of my favorite ways to relax on my first day in the country is to take a train to Flüelen at the southern tip of the lake, and ride the boat back to Luzern, with a meal on board the boat.
Really, although Luzern does a good job because of the beautiful location, the best way to experience the natural beauty of the country is to get outside the cities. Athletic types use the extensive trail network to get into the more rugged country, where you are in the midst of the alpine beauty. However, you can see a lot of it, and try out some short walks in the area all around the Jungfrau. You don't have to walk, unless you want to, because of the extensive network of trains, buses, cableways, and trails. You can go up and see a lot, by using the transport network:
www.swissholidayco.com /Public/Assets/User/fi les/Map-of-Jungfrauregion1.jpg
Interlaken only gets you close to that. Interlaken is a nice transportaion hub, at the mouth of the valley which leads in to the villages of Grindelwald and Lauterbrunnen, and thence upward to Mürren and Wengen and then further up to mountain peaks or small level areas- Männlichen, Kleine Scheidegg, Schilthorn, Jungfraujoch. To be immersed in that , you should stay at Wengen, Mürren, or Grindelwald ( more commercial but great views) or Lauterbrunnen..on the floor of the beautiful valley. But, you can go there easily from Interlaken, it's just that you are not surrounded by the grandeur in Interlaken.
Lucas has given some highlights in his post.
I'm responding to your interest in natural beauty, and suggest that you skip Bern as well. (or,make it a day trip from Luzern or Interlaken if you have cloudy weather than hides the mountains.
With your available time, personally, I'd stay at or near Luzern (maybe one of the small owns round the lake, such as Weggis, or Brunnen) ....although it's only an hour from Basel so you can make day trips. Then, I'd also stay somewhere near the Jungfrau. Interlaken is one choice if you want to use it as a base for places in the Bernese Oberland not near the Jungfrau in addition to the Jungfrau. If your focus is only on the Jungfrau region, I like the villages, such as Wengen ( my personal favorite).
Use the map I provided earlier and check out Interlaken, Jungfrau, Schilthorn, Wengen, etc.
For perspective, the largest city in the region is Interlaken. Population is 23,300, including the nearby smaller villages located within a few kilometers.
Small towns in Switzerland often have "old town" centers, dating back to the Middle Ages. Remnants of town walls show where the city was centuries ago. Murten is a nice one not terribly far from Bern or Basel:
My own explorations of Swiss beauty are often in regions some distance from the cities, and in addition to the usual tourist destinations such as the Jungfrau region. I've attached a few images of the Alps (and other scenes) taken from out of the way places, just for a sampling of what you can see if you hike a bit or know where to go in the countryside...Some things to tempt you on your next trip.