Nepal is famous for being where the Himalayas are found. Millions of people over the years have visited this magical country to have a once in a lifetime experience of the sow capped mountains. There are plenty of well known reeking routes here, but I think one of the best is the Manaslu Circuit Trek.
Manaslu has only opened to foreign visitors in the last few years, since its opening it has grown in popularity with the world wide trekking community. You need to make sure you have prior permission before you trek there but that is an extremely simple process.