Hacienda Na Xamena, Ibiza

La Posidonia Spa sits inside Hacienda Na Xamena, a clifftop hotel on Ibiza's north coast overlooking the Mediterranean. This is a hotel spa in the strict sense: there's no day-pass option, so access is reserved for guests staying at the property, and the wellness experience is listed as valid for adults only, on stays of at least three nights.

Treatments run through massages, SkinCeuticals facial work and body treatments, with the outdoor side of things covering yoga sessions and hiking trails that use the surrounding landscape rather than a separate studio. It's a low-key setup built around a single treatment space rather than a sprawling wellness complex, meant to pair with a stay rather than stand on its own.

The hotel itself has 69 rooms and suites, an Eden Restaurant for Mediterranean-leaning food, and the Los Nidos rooftop bar for drinks with sea views. Weddings and events also happen on-site, using the amphitheatre, rooftop and an adjoining property, Finca Na Xamena. Staff work in English and Spanish, and the hotel operates in the luxury price tier, consistent with its adults-only, guests-only model.

Anyone considering a visit for the spa alone should know upfront that this isn't a walk-in option — it only works as part of a hotel booking, and reservations currently go through email or phone rather than the online system, which the hotel notes is experiencing issues.