As pollution levels continue to rise in neighbouring states of Haryana, Punjab, Chandigarh, Delhi and the surrounding National Capital Region (NCR), the pristine mountain air of Himachal Pradesh's capital, Shimla, is attracting a surge of tourists.

Under the clear blue skies, visitors are flocking to the region, drawn by the clean environment, fresh air and the stunning panoramic views of Shimla, the "Queen of the Hills."