Taking a kayak out into one of the local waterways on an early morning. We have a few canals that run through a nature area on the outskirts of the city. Around that time no one is yet on the water and I can just glide peacefully past the water lilies and other plants. The silence is so soothing. Everything just seems to live and breathe all around me.
It's great until about an hour later, when some of the locals use their motor boat to put-put-put down the canal, stinking up the place with their exhausts :P