Kashid is a village 37kms ahead of Alibaug. It is famous for its pristine beach. Amidst that you have a 4 star resot, Prakruti. It is an amazing place with all kinds of facilities like swimming pool, billiards, golf, massage etc. Rooms are available for all sizes, couples get a AC room whilst groups can take individual villas n bungalows. Service is responsive.
Most amazing aspect is it has its own pvt beach across the road. Awesome! Clear water, nice sand, no crowds, very clean. This place charges approx 5-7k per couple depending on weekdays/weekends inclusive of 3 buffet meals. The food is awesome as well. Can be reached by road from Mumbai (130km) in 4hrs and by ferry (get off at Mandwa jetty and cab it till Prakruti, 55km). If you plan to travel by ferry you can call the resort in advance for pick up at extra cost.