Steep Rock Preserve Tunnel
This rough-hewn tunnel is part of the Steep Rock Ridge in the 998-acre preserve. It's 235 feet long and was carved into the hill around 1871. It was an arduous task - the workers had to use pickaxes and dynamite to break through to the other side. To get there go from the main parking lot (next to the horse riding ring) and take the yellow circle trail along Tunnel Road to the blue square trail to the Railroad Tunnel. It's open 24/7.