Arthur's Pass is located in the south island of New Zealand and most commonly started from Christchurch through to Greymouth and return for a round trip.
One of the first stops I would take is to see Castle hill which is a valley filled with giant limestones that have been set in place for many years. It has gained intreats as it was the backdrop for a battle scene in the film Nania all with flock hill close by.
It is located just off state highway 73 and is in-between the small town of Darfiel and Arthurs Pass offical start.
Be sure to start your day early so you can get the full experience of the surrounding mountains and New Zealand wild life.
A must see stop is the view point for Otiria Viaduct, it is fascinating to watch the cars go by on this high rise bridge that curves and bends into the mountain side.
There end destination of Grey mouth town is not to much to rise home about but Arthur's Pass is known best for the journey and road trip along the way especially at a time just on the edge of winter so you can drive without chains on your tires but there is still snow not he tips of the mountain to make them glow with sunlight.
Alternatively if you do not have a vehicle to do this trip in a camper or car there is the Tranz Alpine railway that you can enjoy for a good chunk of money however the views are 100% worth it. It departs daily from Christchurch at 8:15 am and arrives at 1:05 pm in Greymouth