There is a walking path all around Lake Geneva. You will probably not want to walk the whole thing, as it is 22 miles, so keep that in mind if you want to drop a car off at your end point or just go out and back. Can pick up this trail anywhere really, but we recommend starting downtown.
This is one of our favorite spots to go for sunset/anytime. They have a big pontoon boat that takes customers out for a short ride every 30min-ish complimentary. Piano bar inside and live music outside often.
Variety of different boat tours around Lake Geneva
Beautiful dinner spot on the lake. Often have live music.
Cute spot on the lake for local wines and small plates
If you like to golf , Geneva National has great courses to golf on. There are several other courses nearby for more beginner golfers, also.
Great pizza spot in downtown Lake Geneva. Matt recommends pepperoni ;)
This is a fun local brewery downtown owned by Lauren's family friends.