Vishwanath Temple, Guptkashi is a Shiva temple. It is said that the linga at the temple was consecrated by Agastya muni. There is a place to sit and meditate. You can go into meditative states here effortlessly.
How to get there:
The temple is located 43 kms North of Rudraprayag on the way to Kedarnath.
Map: https://goo.gl/maps/UZYiUeQateNnAaV59
Kashi Vishwanath Temple, Guptkashi
Guptakashi is a wonderful place, the consecration of the lingam has been done very wonderfully. This is an area where Agasthyamuni walked, probably he even visited this temple; either himself or probably one of his people, because the nature of the lingam is such which is in line with Agasthiya’s way of doing things. I have already spoken about who is Agasthiya? I have. It is very much in the line with Agasthiya, so it is either himself or somebody like him, or in his line of duty who have concentrated this linga. That’s the reason why Sadhguru chose that particular temple. When they could not do things in Kedar because of weather conditions, the next immediate option was Guptakashi because it’s very much in the line of Agasthiya’s way of doing things which is pure kriya, which is 100% energy work. No other things, no mantras, no tantras, no nothing, it’s 100% energy work.
Source:
https://isha.sadhguru.org/us/en/wisdom/video/what-makes-kedarnath-and-kashi-so-powerful