Combination rock features contain both real rock and artificial rock work. The most common example is the grotto/slide combo. Slides are built out of artificial rock but the combo allows the customer to still have as much real rock as possible. The grotto flat often times needs to be built out of artificial rock for safety or due to a lack of crane access. Please view the gallery to see some examples of this type of work. The pictures show just how closely the artificial rock is made to match the real rock that surrounds it.