Kolaba fort

Kolaba Fort (the 1680 CE black basalt island fortress standing 1 km out in the Arabian Sea, celebrated as the historic naval headquarters of Chhatrapati Shivaji Maharaj and Sarkhel Kanhoji Angre) off the shores of Alibaug in Maharashtra, stands as Raigad's supreme Maratha maritime citadel and low tide heritage landmark.

Commissioned in 1680 by Shivaji Maharaj as one of his final defense projects and fortified in 1698 by Grand Admiral Kanhoji Angre, this sea fortress served as the operational command post of the Maratha Navy, withstanding combined British and Portuguese naval assaults.

It's the home of 17 massive stone bastions, the 1759 CE Siddhivinayak Temple consecrated by Raghoji Angre, the freshwater Pushkarini tank (Padmatirtha) providing sweet drinking water in the middle of the salty sea, the seaward Darya Darwaza opening to crashing ocean waves, and an intensely dramatic, deeply historic maritime ambiance filled with roaring tides, salty sea spray, and panoramic views of Alibaug Beach and the open Arabian Sea.

It represents a rich Maharashtra Maratha naval warfare architecture heritage apex, Sarkhel Angre maritime power, and low tide adventure tourism where island stone ramparts, Alibaug beach promenades, Varsoli white sand shores, and Kihim coconut wadis unite in Kolaba Fort.

Located 1 km offshore from Alibaug Beach, it sits 1.5 km from Alibaug Bus Stand, 30 km from Pen Railway Station, 19 km from Mandwa Ferry Jetty, and 100 km from Mumbai via NH 66, accessible on foot or by horse drawn cart across the exposed seabed during low tide.

The 17 Basalt Bastions & Kanhoji Angre Naval Headquarters

Enclosed by 25 foot-high dressed basalt ramparts, Kolaba Fort features 17 rounded bastions armed with heavy iron cannons that guarded the naval approaches to Alibaug harbor.

Inside the citadel walls lie historical ruins including ammunition storehouses, the royal palace foundations of the Angre admirals, and an ancient temple dedicated to Goddess Bhavani.

Truth is, wading across the wet low tide seabed or riding a traditional horse cart as the fortress walls loom ahead out of the ocean will thrill travelers of all ages.

Siddhivinayak Temple, Freshwater Wells & Varsoli Beach

Siddhivinayak Temple: Built in 1759 inside the fort, this black stone shrine houses an idol of Lord Ganesha and continues to hold daily devotional aartis.

Varsoli Beach & Kihim: After returning to the mainland, visitors can enjoy water sports at Varsoli Beach or relax under the palm wadis of Kihim Beach.

Kolaba Fort & Maritime Heritage Day Plan

The Low Tide Sea Fort & Coastal Trail: Check the daily tide chart and arrive at Alibaug Beach during low tide (8:30 AM to 9:15 AM) -> take an exhilarating walk or horse drawn cart ride across the 1 km exposed seabed to Kolaba Fort (9:30 AM to 10:00 AM) -> explore the fort interior for 2 hours (10:00 AM to 12:00 PM: walk the 17 stone bastions, offer prayers at Siddhivinayak Temple, view the freshwater Padmatirtha tank & photograph the seaward Darya Darwaza) -> return to Alibaug Beach before high tide begins (12:15 PM to 12:45 PM) -> authentic Konkani seafood thali lunch in town featuring surmai fry and solkadhi (1:00 PM to 2:15 PM) -> visit the 1612 CE Brahma Kund stepwell (2:45 PM to 3:45 PM) -> water sports and sunset beach walking at Varsoli Beach (4:15 PM to 6:30 PM) -> evening dinner in Alibaug.

Visiting Code & Conduct: Always check local tide charts before visiting; the fort is accessible only during low tide; ensure you return to the mainland at least 60 minutes before high tide; wear water resistant footwear for walking across wet sandy tidal beds.

After exploring the island citadel of Kolaba Fort, visit Alibaug Beach, relax at Varsoli Beach, or explore Kihim Beach.