Depends on what you really mean:
1) where do you store/hang dry towels?
2) where do you hang a wet towel?
For us, those are different. Dry folded bath towels are stored in a cabinet and dry hand towels are stored on loops/rings near the sinks. Wet towels are hung on shower bars. We have switched to fast/quick dry towels .... thinner and smaller but they dry overnight and never smell musty.
2005 Newmar Essex 4502, 2013 Caddy SRX
1997 HR Endeavor 37, CAT, 1996 Geo Tracker