Hi Kritikagupta -
I have not been to Adelboden. My unreliable impression is that it is primarily a ski resort. I have no information one way or another about scenery. Probably, in warm weather, there are also some nice hikes.
There is at least one nice, easy, high altitude trail:
Altitude is about 1350 meters, so it is about the same as Wengen, at 1275. Likely, there fore to have similar snow/weather patterns.
There is an impressive waterfall:
In general, it is a much less impressive and expansive region than the Jungfrau region. Less variety. No Jungfrau. No cograil train.
By the way, in general, all public transport that goes to population centers -towns, villages, cities, and usually in cities, is covered by the Swiss Travel Pass (check here for more ticket information). It can be a bus, a boat, a train, a cograil train , or a cableway, a tram. An exception- boats on Lake Zürich have just added a surcharge...maybe 10 CHF...
What is not covered or is only discounted, is travel on ski lifts, excursion lifts or funiculars, privately run trains ( Jungfraubahn) and other transport to scenic places or sightseeing trips without a component from town to town.
This concept works as follows in this example for the trip to Jungfraujoch from Lauterbrunnen. The part from Lauterbrunnento Wengenis covered by the pass. Lauterbrunnen is a town. Wengen is a town. From Wengen onward, the same train is now going to a sight-seeing location- Kleine Scheidegg or the Jungfrau. That part is not fully covered...some discount is offered.
Checkout the coverage details and validity under the link for Swiss Travel Pass:
There is a reasonable chance that you are getting a good deal because it is slow (or low) season in Adelboden with no skiers, but not yet summer season for hiking. In Wengen, most hotels and restaurants open up in mid June..... but, they are not very busy until late June or, more so, July. I would not be surprised to find the same thing in Adelboden. I repeat, however...I've never been there.
They are scarce in Switzerland, as Lucas notes. However, with the strong Swiss Frank, they're more common than they used to be, because Switzerland has become much more expensive for its European neighbors ( who use the Euro) to visit. The Swiss are losing business from Europeans. That could also contribute.
Finally - since you are going to Switzerland on a special occasion and for a rather short trip, which is more important to you - a good deal or the best experience?
I go to Switzerland a lot. I often stay in out-of-the way places to reduce costs, or enjoy Swiss countryside culture and inns, or walk in the surroundings which can be nice but not spectacular. I may scout out places to get a particular kind of photograph. See attached. I stay in places that are very Swiss, but not necessarily very spectacular. For example, I always stay some in the Emmental.
If I take a relative to Switzerland for the first time, we always go to Luzern and the lake, and to the Bernese Oberland, sleep in hotel with a view of the Jungfrau, and see the best sights that Switzerland has to offer. After that, we go into the countryside.
What are your priorities?