I just came back last night from a trip to Lake Geneva, Switzerland (or Lake Leman, if you prefer). Very awesome. I posted a bunch of photos from the trip
over here.
If you have no idea what its like on Lake Geneva, imagine a huge beautiful clean lake, surrounded by small medieval towns, castles, vinyards, etc. You can take a small riverboat across the lake to every town. The trip around the entire lake's length takes about 16 hours, round-trip, but its well worth it.
Oh I am SO coming back to that place...