What are the best Once in a Lifetime Experiences in Florence?

The best Once in a Lifetime Experiences in Florence according to Viator travelers are: <br/><ul><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Florence/Small-Group-Wine-Tasting-Experience-in-the-Tuscan-Countryside/d519-5292P25" target="_blank" rel="noopener">Small-Group Wine Tasting Experience in the Tuscan Countryside</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Florence/Self-Drive-Vintage-Fiat-500-Tour-from-Florence-Tuscan-Hills-and-Italian-Cuisine/d519-5070FLORENCEFIAT500" target="_blank" rel="noopener">Self-Drive Vintage Fiat 500 Tour from Florence: Tuscan Hills and Italian Cuisine</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Florence/Tuscany-Hot-Air-Balloon-Flight/d519-6365HABFLR" target="_blank" rel="noopener">Experience the Magic of Tuscany from a Hot Air Balloon</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Florence/Get-Married-in-Florence/d519-8724P2" target="_blank" rel="noopener nofollow">Get Married in Florence</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Florence/Sienas-Palio-Horse-Race-Including-City-Tour/d519-5919SAYPALIO" target="_blank" rel="noopener nofollow">Siena's Palio Horse Race Including City Tour and Dinner</a></li></ul>