One of a kind excursion?

Where in Provence and Cote d’Azur are you staying?

If you are terrified of heights, I strongly suggest you disabuse yourself of the notion that taking a balloon ride with a tense, nervous, stressed out wife will be any sort of romantic experience for your spouse. Move on to other ideas..........

One idea is simply to google "Day Tours or Experiences in ____________" and see what ideas come up. That might be a starting point.

I've never used Airbnb at all, but folks have mentioned booking Airbnb experiences. I'm nearly certain you can do that even if you are not staying in an Airbnb property. The website Toursbylocals also might give you some ideas.

I think it would be fun to hire a private boat for the two of you at Nice. I always recommend contacting the actual person instead of booking through Viator, etc. but this will get you started if you like that idea:

https://www.tripadvisor.com/Attraction_Products-g187234-zfg11865-a_contentId.126988924278+14327703771-Nice_French_Riviera_Cote_d_Azur_Provence_Alpes_Cot.html

Lamborghini on the race route and haute Corniche, absolutely. I got to the Riviera this afternoon. I’m here often for family and never tire of it. It is so, so beautiful. The haute corniche is my favorite.

The non-lethal local Bull games, Course Camarguaise, have begun on Sunday afternoons in Languedoc for young competitors. Probably Provence, too. Check listings in local papers or the tourist office for info.

Private behind the scenes or early entry to a museum or the Eiffel Tower?

Thanks for the suggestions everyone.

Jean: Fabulous idea that I wouldn’t have thought of. Thank you! He’d love a boat cruise. I was hoping to go from Nice to le Cornich D’or by boat, but only see tours that leave form Cannes, which we don’t want to visit. When you suggest contacting the actual person that does it, how do you get that info?

Suki: We are basing ourselves in St Remy in Provence and Nice in the Cote D’Azur.

Acraven: thanks for the link. Love the idea of a local guide.

Bets: Thanks for the reassurance. I think he would love that option. Looks like it would have to be just him and the tour guide, but that’s not a problem for me. Just have to stop thinking about Grace Kelly……

I love the idea. You already have 2 of my ideas, going to a local soccer game or renting a Lamborghini. Is he a golfer? Looks like there are a few nice courses in the area. Is he into live music? KISS and The Rolling Stones are both touring Europe this Summer (I know because we are going to see them both (KISS in Nimes and Stones in Brussels)). But there are other music festivals and tours that might be of interest.

Another thought, do you have a prestige credit card like Amex Platinum? They have a concierge service for this sort of thing. Also, Conde Nast Traveler and Travel & Leisure have lists of fancy travel agents all over the world that claim to offer "once in a lifetime" type experiences and they probably do deliver (as long as you have the dinero).