2. Tamil Nadu is the only state with coast in Arabian sea, Bay of Bengal and Indian ocean.

3. When most of the country receives rain during south west monsoon (Jun-Oct). Tamil Nadu receives its main rainfall during North East Monsoon (Mostly Nov-Dec)

4. Tamil Nadu is the only state with Hill station that can be visited during June to Sep without getting drenched in rain. Tamil Nadu Hill stations like Ooty, Coonoor, Kotagiri, Manjolai,. Megamalai, Yercaud, Jamunamarthur, Yelagiri and Kodaikanal receives their main rain during winter - Oct-Dec. So, it is considered the best suited hill stations during Summer. Ooty and Kodaikanal has lowest avg. temperature during winter in south India.

5. Manjolai in Tamil Nadu is the highest rainfall place(>2500mm) in the country during winter (Nov-Dec). One of the highest rainfall places during winter in the northern hemisphere.

6. Due to eight month rainfall in its northern coast (Pulicat to Vedaranyam)(thunderstorm during SWM. Monsoon during NEM). Tamil Nadu is the only state in the country and one of the very few places in the world to have dry evergreen forest.

7. The Lowest annual rainfall district in Kerala - Thiruvananthapuram dt (1828 mm) has more rainfall than the highest rainfall dt in Tamil Nadu The Nilgiris (1567mm). Average annual rainfall in TN is ~898-958 mm. Top 5 Annual Rainfall Districts are 1. Nilgiris(1522-1567mm) 2. Kanyakumari (1302-1408mm) 3. Chennai(1324-1358mm), 4. Nagapattinam(1293-1393mm) 5. Kanchipuram(1215-1227mm)

8. Even though Tamil Nadu is a dry state but it has places which see highest rainfall in a day. E.g. Avalanche in Nilgiri district recorded 911mm rain in 24hrs, 1731mm in 48hrs. Upper Bhavani, Avalanche, Mukurthi, Devala rain stations register one of the highest single day rainfalls in the country.

9. Tamil Nadu has 34 distinct river basin, Considering all the west flowing rivers as one(i.e. BharataPuzha, Chalakudi, Idamalayar, Chaliyar as one). Tamil Nadu rivers are classified into 17 hydro-logical river basin. Tamil Nadu do not have any continuous large highland river basin. It is simply do not have place to build any large dams.

9. Tamil Nadu has highest population in the South India but if you add all the locally generated surface water flow in the whole state, it is less than water inflow seen in SriSailam dam built across river Krishna in Andhra Pradesh.

10. Suruliyar Hydro power plant across Suruliyar River (Vaigai ) in Theni district has the highest head of any hydropower plant in India with 979m hydro head.

11. Tamil Nadu has lowest surface water in in the south also one of the lowest per-capita surface water in the country.

12. Tamil Nadu has highest installed wind power (9200MW) plant in the country. It competes with Karnataka for top slot for overall installed renewable energy (16300 MW).

13. Tamil Nadu is the only state/province in the world to tap 110% (!!!) economically available hydro power sources. As of Now, Tamil Nadu has 2200MW installed hydro power stations. Extra 10% due to, TN generating power from water diverted from Kerala in PAP project and Mullaperiyar. Compare this with Srisailam dam, just one dam has 1670MW power capacity.

14. Tamil Nadu is the only state with all kind of Hydro Power stations and turbines.

• * Tamil Nadu has high head traditional hydro power station (Both tunnel and penstock)
• * Tamil Nadu also has low and medium head hydro power stations
• * Tamil Nadu also has seven run off the river hydro power stations across Cauvery (7*30MW = 210MW). 1. Chekkanur Barrage 2. Nerinjipettai Barrage 3. Koneripatti Barrage 4. Uratchikottai Barrage 5. Samayasangili Barrage 6. Vendipalayam Barrage 7. Solasiramani Barrage.
• * Tamil Nadu also has pumped hydro project Kadambarai pumped hydro station( 4*100MW), Kundah project is in construction.

15. Bhavani river is one of the high gradient river in the country with highest fall in few km. It is also Source of more than 40% of TN hydro power (>850MW).

16. Tamil Nadu has highest number of large lakes/dams above 2000m height in a single region. Nilgiri District (Avalanche-Emerald - 5.5 TMC, Upper Bhavani - 3.57 TMC, Porthimund - 2.12 TMC, Pykara - 2 TMC, Mukurthy - 1.79 TMC, Sandyanallah - 0.94 TMC, Parsons Valley - 0.68 TMC ..etc).

17. Tamil Nadu is the only state whose map looks like a human head

18. Tamil Nadu has highest installed nuclear power capacity in the country (~2400MW). In few years Tamil Nadu will be the only state in the world with Thorium based Nuclear power plant.

19. Tamil Nadu is the only state in the country with 1000 MW rating single Transformer and generator unit located in Kudankulam power plant (I am an Electrical Engineer. can’t help).

20. Tamil Nadu has largest sea water desalination capacity in the country.

21. Cauvery river basin occupy 1/3rd of Tamil Nadu area. Cauvery is a medium sized river, it is 11th largest (individual river) in India.

22. Even though cauvery is small river, but it created large natural delta in Tamil nadu, it is comparable to other delta created by larger rivers. Cauvery delta is one of the flattest delta. After Trichy, Cauvery river split into 120 dis-tributary (sub-river) forms natural nerve system of Cauvery delta region (> 6700sq.km). From Kallanai, till the tail end of Pumpuhar and Karaikal is just 120km but cauvery streams and sub-streams in the delta have the total length of 42500km.

23. Tamil Nadu has shallow sea in its southern tip near palk strait. One can walk more than 3–5 km into the sea without drowning. Tamil Nadu and Srilanka is connected by land. After 15th century shallow sea sunk those landmass.

24. Gulf of Mannar Marine Biosphere reserve is the only marine biosphere reserve in the country. Tamil Nadu has three UNESCO listed biosphere reserve (Nilgiri, Agastya Mala, Gulf of Mannar).

25. Tamil Nadu has both Western and Eastern Ghats. In Western Ghats, it has Nilgiri Range, Anaikatti Range (Noyyal/Maruthamalai), Anaimalai range, Palani Hills range, Cardamom hill range and Agastiya Malai Range. In Eastern ghats - Jawadu hills, Servarayan hills, Kalvarayan hills, Yelagiri hills, Kolli hills, Jarugumala, Sirumalai, Alagar hills, Hasanur/Talavadi/Bargur range and TN Koundinya range.

26. Tamil Nadu also has its own sand dune desert called Therikadu in Thoothukudi dt. It is one of the redsand dune desert in India.

27. Almost 100% of India’s anti-venom for snake bites is supplied from Tamil Nadu by Irula co-operatives. King Institute of Preventive Medicine and Research in Chennai is one of the few centers in the world to produce anti-venom for King Cobra the most venomous snake species.

28. Tamil Nadu has most number of island surrounded by salt water sea in peninsular India. Rameswaram is the largest island by area in Tamil Nadu surrounded by salt water sea.

29. Tamil Nadu has healthiest coral reefs in Mannar Marine park in gulf of Mannar and Palk strait. It is the best place for snorkling in penninsular India

30. Mumbai is city of Mangroves. Andhra Pradesh and West bengal are state of Mangroves. Tamil Nadu has fraction of national mangroves but it has its own mangrove forest which are easily sailable.

31. Agasthyamalai forest range shared between Tamil Nadu and Kerala has one of the largest number of endemic flora in India. Tamil Nadu comes in top-3 states with highest flora (plant) diversity in India (Highest in some estimate).

32. Nilgiris biosphere reserve is one of the UNESCO listed biosphere reserve in the world, it contains largest number of Bengal Tigers, Asian Elephant, Gaur/Indian Bison..etc in the single contiguous location in the world. Lies in TN(2537.6 sqkm), KA(1527.4 sqkm) & KL(1455.4 sqkm). Nilgiri has one of the largest number of flora and fauna diversity in the entire world. But unfortunately struggling with fragmentation of forest, invasive plants and dams. It comes in top-3 in India in men-animal conflict. Just in 2020 more than 20 elephant died just in coimbatore forest division. Lots of plants only found in Nilgiris are disappearing every day.

33. TN has around 22000+ sq.km forest land (17% of state area, less than global average) divided into 15 forest circle. Each circle divided into many forest division (45), each division divided into many forest range(203), each range divided into forest section(471). 91 IFS officers manages Tamil Nadu forest.

34. Gudalur forest division in Nilgiri district considered top-3 places in India with highest man-animal conflict in the country. Eco-sensitive zone splits the nilgiri forest into two.

35. Tamil Nadu has 5 tiger reserve(MH-6, MP-6 &KA-5), has fifth highest tiger population. One of the top 5 state for Tiger, Leopard, Gaur and Elephants

36. Kottamalai peak at 2019m elevation situated near Rajapalayam, Virudhunagar district is the southern most peak of India with elevation greater than 2000m

37. Tamil Nadu has more than 20 mountain peak with elevation more than 2300m (donot compare with Himalayan states), highest in Non-Himalayan state in the country.

38. Siruvani forest range in Coimbatore forest division is identified as butterfly super-hotspot. It contains 74% (~240) of all butter fly species(~325) in Tamil Nadu. One of the highest in the country

39. Tamil Nadu is Third largest producer(15+%) of Tea, after Assam(50+%) and West Bengal(25+%), much higher than Kerala. Tea estates are situated in Nilgiris district, Megamalai(Theni dt), Valparai(Cimbatore dt) and Manjolai(Tirunelveli dt).

40. Tamil Nadu has highest number of education institutions that topped in the national ranking.

41. Tamil Nadu has most visible indigenous dog breed in the country, most famous dog breeds are Rajapalayam, Kombai, Kanni/Chippiparai and Mandai. Kanni dog is known for its athletic ability, they can run faster and jump easily without an effort. Kanni also donot bark much.

Rajapalayam known for their milky white and pink eye and intelligence

Kombai dog is known for its high temper, it is considered one men dog, can hunt and eat whole animal.