The Underground Spa & Wellness is Philadelphia's premier luxury spa, rated #1 for Spa & Wellness Centers in the city and awarded Philadelphia Magazine's Best Spa to Visit with Besties. Located within The Logan Hotel, this haven of tranquility is designed to replenish the mind, body, and spirit. Guests enjoy unmatched facials, award-winning massages, and body treatments, alongside access to a heated indoor saltwater pool, state-of-the-art fitness center, and locker rooms. Whether you're booking a solo escape, a couples massage, or a group celebration, The Underground offers a uniquely vibrant, welcoming atmosphere where luxury is reimagined — leaving you relaxed, recharged, and renewed from head to toe.