Hanging Rock and Wabash Reef National Natural Landmark Hanging Rock and Wabash Reef National Natural Landmark is located in Largo, IN. Once you arrive to Hanging Rock there is a small parking lot where you will start your adventure. What makes this place so special? -Hanging Rock contains Siluria coral reef from when Indiana was covered by shallow sea water. -65 feet high above the Wabash River. -200-foot-wide base. -In prehistoric and historic times, many used Hanging Rock for navigation, astronomical observation, and military observation. -Indigenous people and European Americans have used the Hanging Rock as both an overlook and a landmark. The hike to the top is fairly simple! The trail is only 0.2 miles long, the hardest part is the rocky incline. The view from the top didn't disappoint! After taking in the view from the top of Hanging Rock we made our way down to the bottom of the rock. It was really cool to see all the layers. The downfall and the most disappointing pa