The 129-bedroom Sofitel Quiberon Thalassa Sea and Spa has been relaunched in north-west France, following a major revamp led by Paris-based hospitality architects Studio MHNA.

The complex specialises in slimming breaks focused on healthy eating and the thalassotherapy institute – a flagship 5,000sq m (53,280sq ft) facility that has been completely redesigned.

A stand-out feature is a 25m heated (29˚c) seawater pool that is encased in glass and has ocean views. This is joined by a sauna, a eucalyptus-scented hammam, a gym and three exercise studios.

There is also a brand new beauty centre, a hair salon (with Leonor Greyl products) and six single and one double treatment room.

Product houses include SkinCeuticals, Carita and Aquascience - a new in-house natural skincare line based on marine spring water.

Thalassa Sea and Spa is part of the Accor hospitality group.

Details: www.accorhotels.com