Read the following and say whether they are true/false.
1. Gorges are formed because of rock erosion over a long period of time.
2. A five-mile perimeter wall around Gandikota Fort is constructed to protect it.
3. Gandikota, the Grand Canyon of India, is only one such a place in the world.
4. Gandikota is an example of artificial architecture.
5. Gandikota can only be reached by road.