Because of poor visibility due to pollution or weather, rarely these days does one get to see Nepal’s topographical diversity of the Tarai, Chure, Mid-mountains and the Himalaya all at once from one place.

But with a shift in wind direction this week, and the smoke from north India’s crop residue burning and vehicular pollution blown off to the south, the Himalayan mountains have come out in their full glory and are visible even from the plains of Province 2.
 
These photographs were taken on Friday from Rajbiraj of Saptari district near the Indian border of icy peaks that form Nepal’s northern frontier with China. It has indeed become rare to see 150km clear across the breadth of Nepal, as the terrain rise from the tropical plains barely 150m above sea level to nearly nine km in elevation.

https://www.nepalitimes.com/latest/crystal-clear-air-makes-the-peaks-of-the-eastern-himalaya-visible-from-the-nepal-tarai/