Napa Valley, California
Adults-only hotel spa in Napa Valley with a co-ed thermal circuit of sauna, steam room and cold shower, open daily 10am–6pm; day passes available.
$$$
Hotel Spa in Napa Valley
2 spas match
Napa Valley Marriott Resort & Spa
Hotel SpaNapa Valley, California
A hotel spa at the Napa Valley Marriott Resort, open to hotel guests by reservation, geared toward couples and families.
$$$