Special events Special Events Zuiver end of summer retreat Starts at 2:30 p.m. Entrance to the spa from 10 a.m. Participation in 4-hour Zuiver Summer Retreat that includes a steam bath ritual, fire ceremony, Yoga Nidra and sound healing. € 99,00 p.p. Book Zuiver end of summer retreat Starts at 2:30 p.m. Entrance to the spa from 10 a.m. Participation in 4-hour Zuiver Summer Retreat that includes a steam bath ritual, fire ceremony, Yoga Nidra and sound healing. € 99,00 p.p. Book