We had an outstanding time with Gregory Eich as our guide in Yellowstone. Greg not only was very knowledgeable in finding where to view the wildlife but also explained the geology of the area. Greg had great equipment for photographing the wildlife and scenery and he shared all of the photographs at the end of the day. We would highly recommend Greg as a guide. He was very skilled in driving around the other tourists and getting us in the best position to view all of the animals and sites. We ended up the day at Canyon Educational Center where Greg walked us through the exhibits and explain the geology of Yellowstone and what makes it so unique. A very special day that we will always remember.