Costa is a trendsetter in the "spa" accommodation movement -- clustering specially designed cabins around the spa complex -- which it introduced on Concordia in 2006. (Carnival, Celebrity and HAL now all offer such accommodations.) Besides the obvious design distinctions, passengers in spa cabins and suites have private access to the Samsara Spa's self-treatment rooms, which include a thalassotherapy pool guarded by multi-colored dragon-lions, a sauna-like room with Balinese beds and a tiled room with thermal loungers. Passengers also get exclusive access to a spa-friendly restaurant, robes and spa toiletries in their cabins and, depending on accommodation grade, amenities like espresso machines and aromatherapy steamers.