Nyon, you have a lovely castle.
This is a small chateau town. In the 13th Century, Counts of Savoy began building their castles, and the one here is built atop Roman ruins. See ://www.myswitzerland.com/en/destinations/resorts/holiday-destinations-in-switzerland/nyon.html/
Start uptown, for the view,
At Yverdon-les-Bains, where there is another Savoy castle, we learned that the Savoys liked the square format, and some calling it the Savoy Square. The shape lends itself to various performing arts events.
No-one could easily creep up unseen at this towering site. Now there are nice walkways.
This is a nearby large house (when does it become a chateau?), see it to the left of our top photo, where the eye immediately goes to the Chateau de Nyon, all white. Time for this one to come out of the shadows. Not everyone has replastered and whitewashed. Good. We like the ones that show some age.
Get a full walk-around show on Nyon and its streets and buildings at ://www.dpeck.info/nyon1.htm/
Take the elevator down.
You can also walk the winding way back down to the riverfront area, the Rive. That is where our little hotel was, bless it.
Look closely as you walk the rest of the way to the riverfront, and find Roman ruins - there, a structure, a part of wall. Some columns. Julius Caesar established the colony here and called it Noviodunum, after he had finished with his conquest of Gaul.