Suvarnadurg Fort

Admittedly, the 17th-century Suvarnadurg Fort isn’t as grand as the other sea forts on the list, but it’s impressive nonetheless. It was primarily constructed for defence purposes. Though it lies in a dilapidated state, its large bastions and massive stone blocks continue to stun visitors. The only way to reach this astonishing ruin is via boat from the Harnai Port.