Vishnu Prayag
If we start from Badrinath, Vishnu Prayag is the first confluence seen. It is about 30 km from Badrinath on the way to Joshimath. The Alakananda River flowing from Badrinath joins Dhauli Ganga River.
Nanda Prayag
After Vishnu Prayag, we cross the towns of Joshimath, Pipalkoti and continue further, the place where Nadakini River joins the Alakananda River is seen. It is called Nanda Prayag. 
Karna Prayag
Ten km from Nanda Prayag is Karna Prayag. Here Alakananda River is joined by Pindari River. According to Mahabharatha, Karna got the “Kavacha Kundala” from sun here. 
Rudraprayag
Rudra Prayag is a place where the roads to Badrinath and Kedarnath divert. It is an important confluence center where Alakananda River is joined by Mandakini River from Kedarnath.
Rudraprayag is also known for an infamous man-eating leopard. Popularly known as the “Man eating leopard of Rudraprayag”, it created a reign of terror in the Garhwal area for eight years. Officially, it had eaten 128 people before being shot by Jim Corbett. Unofficial numbers rise to few hundreds. For details, refer to the book written by Jim Corbett (In Kannada, refer to the translation by renowned author Poorna Chandra Tejaswi).
The Tiger was shot in 1926.
Devaprayag
It is here the Alakananda River joins Bhagirathi River from Gomukh. The River is then called as Ganga. 
Srik
Wonderful, to say the least! Yes, all of these are 'holy' places, and relatively easily accessable now a days.
Very nice narration, and exceptional photographs. Thanks, Arvind.
Aravind GJ
Srikanth,
Thanks for your comments.
Gowtham
After Uttarakhand floods, I was confused with river names and I recalled these posts and went through this and previous 8 posts. Now I understood. BTW, light brown is Alakananda river in all 5 photographs?
Aravind GJ
Gowtham,
Yes. The light brown river is Alakanada that flows from Badrinath.