Also known as the Ranjit Institute of Polyradio Therapy, Solarium is a one of its kind in entire Asia. It was built by Jam Shri Ranjitsinhji who brought a French architecture in order to construct his unusual structure. It is a slowly revolving tower that provides full daylong sunlight to treat various skin diseases. After destroying of the similar Solaria in France during World War II, it is the only one solarium across the world and indeed a must visit attraction in the city of Jamnagar.