There were a few but first and foremost was going through the sun gate and seeing Machu Picchu, absolutely unforgettable it brings a lump to your throat and puts a tear in your eye.
WinayWayna was superb and we were a little bit nervous it might overshadow Machu Picchu how wrong we were, but is was no doubt in second spot behind Macchu Picchu absolutely terrific.
Looking out from our third campsite what a fantastic view when the clouds finally parted.
And finally getting to Dead Woman Pass and down the other side.
As long as you are reasonably fit this trek should not be a problem.
If you think your knees might not like the steps use knee supports, I had not had any problems with my knees prior to this trip but I suffered on the the downward parts of the trek. 3000 steps downhill in one go is hard going.
Take walking poles they are invaluable.
Take Deet spray and make sure you use it the one day I left it off the mosquito's had a field day.
The 10k weight limit for the bags the porters carry needs a little bit of planning for what you can do without. I took thermal underwear but could have left it at home as is was not as cold as I expected.
Drink plenty of water don't allow yourselves to dehydrate.
I took dollar notes and travellers cheques and our guide took us to a change place in Cuzco to change money to Peruvian Sols. Most places take dollars or sol in Lima and Cuzco but hady to have Sol on the trek.