jaipur, rajasthan, india. jantar mantar is astronomical observation site built in early 18th century. it includes set of

jaipur rajasthan india light celestial across sightseeing observation sun culture cultural heritage astronomic evening sundial complex famous astronomical clock tower cosmological unique hindu discovery earth medieval diversity system engineering site center life sunset unesco sstkindianculture monument astronomy hinduism measure jantar observatory calculating space maths scientific mantar country instrument landmark calculation sunlight science scenery walk measurement historical history indian