What is "khushbagh"

Khushbagh (also spelled as Khoshbagh), meaning Garden of Happiness is the garden cemetery of the family of the Nawabs of Bengal. It lies on the west bank of the Bhagirathi River, about one mile from the east bank. It is also reputed to be the resting place of Nawab Siraj ud-Daulah, along with his wife Lutf-un-nisa, Nawab Alivardi Khan, Alivardi Khan's mother and others. Khushbagh hosts the graves of the Nawabs of Bengal belonging to the Afshar dynasty and their family members while Jafarganj Cemetery hosts the graves of the later Nawabs, starting from Mir Jafar, who belonged to the Najafi dynasty and their family members.