What are the best Hop on Hop Off Buses in Arizona?

The best Hop on Hop Off Buses in Arizona according to Viator travelers are: <br/><ul><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Phoenix/Small-Group-Deluxe-Grand-Canyon-Day-Trip/d639-3002GCN" target="_blank" rel="noopener">Small-Group or Private Grand Canyon with Sedona Tour from Phoenix</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Grand-Canyon-National-Park/Bar-Hop-Retro-Party-Bus-Old-Town-Camelback-Biltmore-Scottsdale-ASU/d815-221047P1" target="_blank" rel="noopener">Take a Scottsdale/Valley Tour in a Retro Party Bus - Old Town/Scottsdale</a></li><li class="my-2 my-lg-0"><a href="https://avionero.partner.viator.com/tours/Sedona/Hop-on-Hop-off-Wine-Crawler-Daily-Pass/d750-284719P1" target="_blank" rel="noopener nofollow">Private VIP Customizable Cottonwood, Page Springs Wine Tour</a></li></ul>