There are a bunch of amazing places which you can visit near Guwahati. Since you are in the North East, you don't have to look too far for wildlife, or mountains, or forests. Head to Nagaland, Mizoram (via Silchar), Shillong and much more. You can also visit Kaziranga wildlife sanctuary and see the famous one-horned rhino. You should definitely visit the island of Majuli located near Jorhat, which is the largest river island in the world.