Visitors stand on a bridge spanning across Cook's Branch stream while at the 5,650 acres of Cook's Branch Conservancy in Montgomery County north of Houston, Wednesday, Nov. 14, 2012, in Montgomery.  Operated as a program of the Cynthia and George Mitchell Foundation, Cook's Branch Conservancy offers a rare glimpse into what nearly a century of regeneration looks like in the Pineywoods region of East Texas. Photo: Michael Paulsen, Houston Chronicle