G2O Spa & Salon is a pampered person’s fantasy land, with five floors of total spa immersion. Those in search of restful relaxation can easily spend the entire day indulging in treatments and quiet contemplation throughout the sprawling complex. The spa, originally two historic Newbury Street brownstones combined into one space, offers a lovely urban escape. Once inside, you’d never know that the hustle and bustle of Boston’s trendiest street is just steps away. Some of the unusual offerings include the Experience Room, which combines herbal-infused steam with a refreshing ice fog and tropical shower; the brine inhalation therapy room, with a three-tiered waterfall; a penthouse roof terrace, where you can relax on lounge chairs or enjoy a spa lunch; and perhaps one of the best perks of all: a nap pod, where you can end your day of treatment with a short snooze.