volcanic rock in the famous blue lagoon in reykjavik/iceland.

algae amazing attraction background bath bathing blue colors concept copy culture famous geological geology geothermal geothermic green healtcare health heat iceland icelandic keflavik lagoon lava mineral minerals mud natural nature nordic pool psoriasis relaxing resort reykjavik reykjavikiceland rock salts silica spa space steam sulfur svartsengi text therapy thermal travel treatment volcanic volcanism volcano warm water wellness