Short answers, pulled from the story.
Verinag is famous for its natural spring and the Mughal garden built beside it in the early 17th century. The Archaeological Survey of India recognizes the site as a Monument of National Importance. The spring is also the primary source of the Jhelum River and is considered the gateway of Kashmir for travelers arriving by road from Jammu.
Mughal emperor Jahangir ordered the octagonal tank of sculptured stones built at Verinag spring in 1620 AD, the 15th year of his reign. He brought stone carvers from Iran to carry out the work. The construction date, 1029 Hijri, is inscribed on a stone slab set into the southern wall of the spring.
Jahangir had visited the Verinag spring twice during his father Akbar's lifetime and was deeply moved by its beauty. He expressed a wish to be buried at the Verinag gardens, but his wife Nur Jahan did not honor that request. Today nothing remains of the pavilions that once stood in the area.
Verinag spring is the primary source of the Jhelum River, known in the Kashmiri language as 'vyeth'. The Jhelum flows through the entire valley of Kashmir before entering Pakistan-administered territory. Water from the spring travels down a 300-yard canal into the Bihat River.
The Verinag Mughal Garden follows the Persian Charbagh tradition, a garden form inspired by the Quranic description of paradise as having four rivers. The classical Charbagh layout required modification at Verinag because the water source sits at the top of the hillside rather than at the garden's center. The garden measures 460 metres by 110 metres, with a main canal running 305 metres long and 3.65 metres wide.
Two stone slabs at Verinag spring carry Persian inscriptions recording its construction history. The southern wall slab, dated 1029 Hijri (1620 AD), closes with the verse 'May the mansion last for ever together with the spring Vernag!' The western wall slab, dated 1037 Hijri, records that Haidar built the cascade and aqueduct by order of Shah Jahan and includes the line 'by this cascade Kashmir attained glory.'