Reem Ahmed Health retreat in the heart of a stunning Welsh valley named one of UK's best. Forest Retreats near Tintern has been recognized as one of the best places to relax and unwind. The yoga retreat has been named among the 12 best in a list by The Guardian. Reem Ahmed Health retreat in the heart of a stunning Welsh valley named one of UK's best. Forest Retreats near Tintern has been recognized as one of the best places to relax and unwind. Reem Ahmed Health retreat in the heart of a stunning Welsh valley named one of UK's best.