Tamilnadu is located in extreme south position in India. It has plenty of visiting places in various categories like Natural, Temples, Beaches, Waterfalls and dams. Tamilnadu has has very important temples like Rameswaram Temple, Madurai Temple, Kanchipuram Temple and much more.
Species at Redwood National Park : References : 
What is Marshland, Why It is Important : Importance of pallikaranai marshland ecosystem Information: Birds and Species in Pallikaranai Marshland: Some of the species and plants from Pallikaranai Marshland (Source), Impacts on Polluting Pallikaranai Marshland:
The Dudhsagar waterfalls which is located in the border of Goa and Karnataka state. The Falls height is about 300 meters and which is part of mandovi river. The sightseeing from Train will be an amazing feel. The Dudhsagar waterfalls
The Great Barrier Reef is a site of remarkable variety and beauty on the north-east coast of Australia spread over 2300 kilometers. It contains the world’s largest collection of coral reefs, with 400 types of coral, 1,500 species of fish