Nagarkot is the best sport for sunrise, sunset, mountain view and day hiking. we offer best day tours around here.
Option first: you will drive to shankhu which is Newari traditional village of north Kathmandu;also the religious place of Hindus. you will have walk though the vegetable /rice farm,village and forest for 4 hours. afternoon can take a lunch at Nagarkot hotel. evening see the sunset from there and back to Kathmandu by car.
Option second : you just take a car to Nagarkot for sunset or sunrise and back to Kathmandu.
if you have 2 or more than 2 days for Kathmandu valley cultural hiking can do Sundarijal, Chisapani, Nagarkot, Dhulikhel hiking