1. Siachen Glacier
-Siachen glacier is one of the world's highest glaciers as it is situated 18,875 ft above sea level.
-It lies in the Karakorum Range of Himalayas.
-It is located in the north of Kashmir.
-Here, Indian and Pakistani soldiers are always on high alert.
-The temperature sometimes plummets to -50 degrees.
-Siachen glacier is the source of water for River Indus.
2. Hot Water Spring, Manikaran
-Manikaran is located in the Parvati Valley between the rivers Beas and Parvati, northeast of Bhuntar in the Kullu District of Himachal Pradesh.
-It is at an altitude of 1760 m and is located about 45 km from Kullu.
-Manikaran has both religious and geological significance as it is a pilgrimage centre for Hindus and Sikhs.
-The water of the spring is supposed to have curative powers. The water is so hot that rice can be cooked in it. Rheumatism and muscular pains are said to cured very fast by taking bath in this water.
-The springs at Manikaran come out to surface with pressure and are very hot.
-It is said to be radioactive.
-The area has a steep geothermal gradient which means that as you dig deep, the temperature of the rocks increases very quickly (more than 30 degrees for every km of depth.
3. Barren Island Volcano
-Barren Island is one of the islands in Andaman and Nicobar islands.
-It has the only active volcano of South Asia.
-The island itself is mostly composed of the volcano and its debris and is part of the chain of volcanoes that mark the boundary between the Indian tectonic plate and the Burmese plate.
-The volcano stands 305m above sea level though it extends almost 2,000m below it.
-The height of the volcano could alter though if a particularly violent erruption destroyed the volcano's flanks and reduced its size or if a slow lava flow continued to add debris to its sides, increasing its height.
-The volcano's last erruption took place on July 19, 2009 and it continues to spew clouds of ash till date.
-Nobody except some wild goats live in the island.
-However, boats and ferries take people to the edge of the island where one can see the breathtaking view of the volcano.
4. Borra Caves (Stalactites and Stalagmites)
-These caves are situated in Araku valley, Visakhapatnam.
-When mineral rich water drips off the roof of the cave, it leaves behind a tiny ring of minerals in its wake.
-As it drops on the floor, it leaves behind yet another minuscle mineral deposit. Over time these deposits grow to form soda straws and cones on the ceiling, while forming conical cake like structures on the floor.
-Borra caves are home to these as well as some irregularly shaped structures in limestone which have been fancifully named by the locals by what they mostly closely resemble.
-One stalagmite resembiling a lingam (symbol of Lord Shiva) even has a shrine around it. the Borra caves are also said to be the deepest in the country.
-November and December are ideal months to visit the caves.
-The caves are open to visitors from 10 am to 5:30 pm.
5. Lonar Crater Lake
-Located at Buldana district of Maharashtra.
-It is made about 50, 0000 years ago by the impact of a meteorite.
-The beautiful lake is 1 kilometer wide and 250 meters deep.
-The Lonar Crater lake is the only meteorite impact crater to have formed in basaltic rock and owing to its origin, the lake's water is saline and highly alkaline in nature.
-This also means that its home to some of the most unique flora and fauna in the country, a fact that's brought scientists from all over the world here to study its characteristics.
6. National Fossil Wood Park
-Located about 1 km east of Tiruvakkarai village and 155 kms from Chennai.
-It has 200 excellently preserved fossilized trees that are almost 200 million years old ranging in length from 3-15 m and upto 5 m in girth are seen lying horizontally scattered over the National Fossil Park. Much of the park lies in disrepair because it is not much of a tourist interest place.
7. Valley of Flowers
-Located in Chamoli district of Uttarakhand.
-It is a national park and 3500 m above sea level.
-It has over 500 species of wild flowers. The best monts to visit are August and September.
-17 Km trek by foot is required to reach the place.
Source - visitindia.org