In 2004, I sold my possessions and hit the road on my bicycle for a 10 month, 7,000 mile solo bicycle trip, going south for the winter and returning north in the spring. Five years after I completed the trip, I wrote a series of ten essays, each on a subject where my perspective had changed due to the trip. I've revised the essays each five years after that, so they've now been revised twice and are in the form of a Google doc that can be downloaded or printed for easier reading. You can also make comments directly in the doc.
If you're more interested in the trip itself, my journal entries are compiled here.