The local take
Jal Mahal is the water palace set in Man Sagar Lake on the Amer Road route. It is best treated as a scenic roadside viewpoint, especially around softer morning or evening light, rather than an interior monument visit.
Jal Mahal Viewpoint is best timed for early evening, when the palace and its reflection are lit by the setting sun and the road along the lake is at its most pleasant for a walk. It works well as a short, low-effort stop rather than a full outing.