THÁC ĐỖ (Cascade Waterfall): A Hidden Wilderness Gem in Western Hoai Nhon - Local Info | Quy Nhon forum: Hidden deep within the western mountains of Hoai Nhon near Quy Nhon, Vietnam, Thac Do (Cascade Waterfall) is a pristine sanctuary where cool,… #ThacDo #HoaiNhon #QuyNhon #ThacNuoc #DuLichVietnam