Harihar Fort is, located in Igatpuri region of Western Ghats.Situated at an altitude of about 3, 676 ft above sea level,this unique fort is built on a triangular prism of rock.

The three faces and two edges of the fort are completely vertical. Rocky steps with one meter wide at an angle of about 75 degrees are also found here. A small temple and a cave with water, situated on the top, are worth visiting.

Thrilling spot : Rock cut steps at an angle of almost 80 degrees vertical. While climbing the fort, we come across a rock-sheet, which has got steps carved in it. Also many grooves have been carved here for additional support. After climbing these steps, we get up to the entrance door.

There is a cavern ahead of this door. Again we come across few steps after a short distance walk from this cavern. On climbing these steps we reach to the main entrance door of this fort. The fort has got a tapering plateau with a raised level in the middle.

One secret-door is located at the edge of this fort, but the way to this door has now got blocked. There is a small temple of Lord Hanumana and Lord Shiva on the plateau. A small pond is there in front of this temple. Water from this pond can be used for drinking. Making headway from here we come across a palace having two rooms in it. 10 to 12 persons can be accommodated in this palace. There are five cisterns along one side of the palace, one of which has water suitable for drinking.