Termas Bonay Wellness is an open-air rooftop spa at the Casa Bonay hotel on Gran Via, inspired by the saunas of Northern Europe and planted with lush greenery. It has a dry sauna, a hammam, an ice bath and a Japanese ofuro tub. Its circuits run for groups of up to six in 50-minute sessions, the whole space can be privatised, and two cabins offer massages and facials.