Longevity Reset Retreat – Minos Palace Resort, CreteCutting-edge photobiomodulation and vibroacoustic therapies are par for the course at Minos Palace Resort's Nao longevity hub (Image credit: Minos Palace Resort)BEST FOR Science-led interventions. HOW TO BOOK Longevity Reset dates will be released in 2026. Mayr Med Diagnostic and Longevity – Original Mayr Medical Resort, AustriaCold plunges are actively encouraged at Austria's Original Mayr Medical Resort (Image credit: Original Mayr Medical Resort)BEST FOR Gut restoration. For almost 50 years, the Original Mayr Medical Resort at Lake Wörthersee in Austria has been a pioneer in the holistic healthcare sphere. HOW TO BOOK Longevity retreats at Le Barthélemy Hotel & Spa range from £3,995 to a whopping £43,120, depending on the length and scope of your stay and treatments.