Harishchandra ghad in maharashtra - ahemdnagar district . I recently went there !! maharashtra is beauty in the time of monsoon . so many waterfalls , treks
I have recently visited Rajmachi trek in Maharashtra. You will just fall in love with the place during monsoon. The trekking trail to this historical fort nestled in the rugged Sahyadri ranges abounds with fort ruins, ancient caves, temples, rivers, lakes, waterfalls, valleys, etc. Explore the architecture of Rajmachi’s two strongholds, Shrivardhan and Manaranjan, and enjoy spectacular views of Konkan plains, backwaters of Shirota Dam, and the surrounding greenery that wears a breathtakingly fresh look post downpours.
If you want a full list of these i have written a blog on this. Please follow the link for the blog
https://www.indianeagle.com/traveldiary/indias-5-best-monsoon-treks-you-dont-want-to-miss/