Years ago, my husband and I were talked into training for a 26.2-mile marathon. I was a plodding runner—well, walk-runner. So, guess which one we decided to do first? London! I know. Crazy, right? Yes, it was. We finished but looking back now, I have no idea how. We started in Greenwich, a town in southeast London. The race goes over Tower Bridge and finishes at Buckingham Palace. Amazing experience, but would I do it again? Nope.