Complex sentence: They visited his father's Santiniketan estate and rested in Amritsar en route to the Himalayan Dhauladhars, their destination being the remote hill station at Dalhousie.
Split into simpler sentences: They visited his father's Santiniketan estate and rested in Amritsar en route to the Himalayan Dhauladhars. Their destination was the remote hill station at Dalhousie.