RESIDENTIAL. MINDFULNESS/INSIGHT MEDITATION RETREATS near Andernach, Germany. With Christopher Assistant Teacher: Tina Degen from Germany has worked in retreats in Thailand and Australia. Since late 2018, she organises Waldhaus retreats, as a member of staff. She now works remotely from Central America, where she teaches mindfulness. A certified Holistic Nutritionist, Tina completed a 12-month Mindfulness Teacher Training Course (MTTC) with Christopher and Ulla Konig.