Valid: Valid Mon-Fri, 10am-8pm. Perfect for: A great way to get help with any issues in a relaxing and calming way. Salt Cave: You'l head to The Salt Cave, in Earlsfield. Aims to: Thought to help with respiratory and skin issues and aid general health. Salt cave: Sit back, relax and listen to music in the natural, tranquil salt cave. Salt therapy: Enjoy a one-hour session of salt therapy at The Salt Cave. Salt Cave Therapy Session | Regional | Living Social | Living Social