Stranded in Nepal

"High up you'll find a gift that's exciting,
But the journey to reach it, you won't find inviting.
Explorers - beware! - it's not the climb you expected,
The journey is perilous, and its Parkland, protected."

"In the direction of the setting sun,
The smallest is home to the largest one.
The trek is hard, but there's no time to wait,
It's hidden in winter, you're almost too late!"

"You've been climbing, it seems, searching the mountains for fun,
But it's not a climb - I told you! It's a place to which rivers run.
It is named after a King, and you'll see that it's deep,
Discover it, and an idol will be yours to keep."