I went to the first field class today--arrived before sunset in a parking lot next to the Potomac. I had the sunroof open and...it started to rain. We suited up and walked toward the river but the rain only increased in intensity. The rest of the group headed for a Starbucks to wait it out...I headed home. As I got closer to home the rain abated and so I decided to take the advantage since"theoretically" I was still not committed to being somewhere else. I guess you can say they're from my extended yard. The "tunnel" is actually a bridge...story is that civil war soldiers hid in this. Who am I to disagree?