Nicknamed “crazy house” by locals, the Hang Nga House is southwest of Xuan Huong Lake. The owner, Ms. Dang Viet Nga, is an architect. Towering fish heads containing guest rooms should you decide to stay overnight. Along the helter-skelter hallways and stairways are cozy nooks and crannies set up as small sitting rooms with desks, chairs, and coffee tables. Pay a small fee and browse around the passageways and take in the atmosphere.