•   Gandikota canyon was formed when the flow of the river Pennar separated the Pink granite that later formed a bedrock.

•   An hour away from the Gandikota Canyon will lead you right next to the second largest caves in India, the Belum Caves.

•   It is located in the Kurnool district of Andhra Pradesh.

•   The Pennar (also known as Uttara Pinakini) rises in the Chenna Kasava hill of the Nandidurg range, in Chikkaballapura district of Karnataka and flows towards east eventually draining into the Bay of Bengal.

•   The fan shaped basin is bounded by the Erramala range on the north, by the Nallamala and Velikonda ranges of the Eastern Ghats on the east, by the Nandidurg hills on the south and by the narrow ridge separating it from the Vedavati valley of the Krishna Basin on the west.

•   The other hill ranges in the basin to the south of the river are the Seshachalam and Paliconda ranges.

•   It flows in Karnataka and Andhra Pradesh.

Tributaries of the Pennar river:

•   The Jayamangali River

•   The Kunderu River

•   The Sagileru River

•   The Chiravati River

•   The Papagni River

•   The Cheyyeru River

•   The Cauvery basin extends over states of Tamil Nadu, Karnataka, Kerala and Union Territory of Puducherry.

•   It rises at Talakaveri on the Brahmagiri range near Cherangala village of Kodagu district of Karnataka. 

•   Its important tributaries joining from left are the Harangi, the Hemavati, the Shimsha and the Arkavati whereas the Lakshmantirtha, the Kabbani, the Suvarnavati, the Bhavani, the Noyil and the Amaravati joins from right.

•   The Manjara or Manjara is a tributary of the river Godavari.

•   It passes through the states of Maharashtra, Karnataka and Telangana.

•   It originates in the Balaghat range of hills near Ahmednagar district.

•   The Tungabhadra River is a river in India that starts and flows through the state of Karnataka during most of its course, before flowing along the border between Telangana, Andhra Pradesh and ultimately joining the Krishna River near Gundimalla village in Jogulamba Gadwal district of Telangana.

•   The Tungabhadra River is formed by the confluence of the Tunga River and the Bhadra River at Koodli which flow down the eastern slope of the Western Ghats in the state of Karnataka.

•   The Tungabhadra River then flows east, joining the Krishna in Telangana.