If it's about wine, the promo code can be spent on a hotel at the Lefkadia/Nikolaev and Sons winery, it comes to 9200 per night.
Or on Gelendzhik, there is the sea and several wineries at once (Chateau de Talu, Mezyb, Krinitsa).

But in general, this all fits into one route, from Lefkadia to Gelendzhik you can order a taxi.

Promo code here.