I recently went to Iceland and spent three days in the capital ... It included access to private changing rooms and showers, a dedicated entrance into the lagoon, and a seven-step ritual.

Outside of the hot springs, you may also smell sulfur ... give yourself a final rinse in cold water after a hot shower).

Quick-drying travel towels are invaluable for hot springs, impromptu swims ... Plus, many public pools in Iceland require guests to shower before entering, so pack travel-sized shampoo ...