This route is all about history, and is following the steps of the 490 BC Battle of Marathon. The most important battle in the whole history.  (Yes; there are no records - or reason to belive - that Pheidippides started in Marathon, but this additional section is added to connect more to the history. It was when they, the Athenians got news about ships coming in - that they send out the messenger Pheidippides from Athen to Sparta to ask for help.) 

Twin lakes are two high-altitude lakes situated over the opposite ends of Manali valley.

Bhirgu Lake (4300m), the high-altitude alpine lake trek is a famous Himalayan destination that has a cut of nature’s opulence for all kinds of people with different kinds of tastes. Starting from the lush green meadows, vistas of snow-capped mountains, grand skyscapes, vibrant flowers, and a touch of spirituality, this place is a serene sanctuary filled with natural surprises.