Old cemeteries are good places to look for lichens.
Sunburst lichens (Xanthoria sp.) are very common on older tombstones.
Not a lichen obviously, but I like it. It's a Sumac tree growing out of an old planter. I like the unique blend of landscapes found in many cemeteries; the tended grass and trees but with an unkempt border, the gravestones mimicking small rocky outcroppings and providing shelter for lichens and moss, and the general lack of people in a man-made environment.