I had to think a bit, but I said that I enjoyed travelling through a med/larger city. I started early in the morning in a very rural area and biked for a few hours on town/county roads until I had reached the outskirts of a sizeable city. Within an hour or so, I'd made my way into the heart of the city and was surrounded by the concrete jungle, dodging traffic. I spent the late morning and early afternoon surrounded by concrete as I worked my way through and emerged from the other side. Within another few hours, I was again in a very quiet rural area, the hustle and bustle of cars in the city giving way to the quiet hum of my tires rolling along.
For me, seeing the contrast of a rural/metro/rural was the neatest 'stretch' of my ride. The city was not important, nor was it a destination. The contrast was what I enjoyed.
Do any of you have any travel memories from a day's stretch that stand out?
(I'd like to see this become a long thread.)