Underi Fort, also known as Jaidurg, is a lesser-known but historically significant sea fort located off the coast of Alibaug, Maharashtra. Built in the late 17th century, this fort was a naval stronghold of the Siddis of Janjira, strategically placed to counter Maratha and British expansion.

Underi Fort remains largely unexplored due to its isolation in the Arabian Sea and restricted accessibility. However, for history lovers and adventure seekers, it offers a unique glimpse into Maharashtra’s maritime history.

 

📜 1. History of Underi Fort

🏰 Early & Medieval History

• Underi Fort was built in 1680 by Siddi Qasim, the leader of the Siddis of Janjira.
• The fort was designed as a naval outpost to monitor the trade routes of the Arabian Sea and defend against Maratha attacks.

⚔️ Maratha & British Era

• In 1681, Chhatrapati Shivaji Maharaj tried to capture the fort, but due to its strategic location and strong Siddis’ defenses, he was unsuccessful.
• Unlike Khanderi Fort (which was under Maratha control), Underi remained under Siddi rule.
• The British took control of Underi Fort in the early 1800s after defeating the Siddis and used it for military purposes.
• Today, the fort is abandoned but remains a historic site.

🏛️ Current Status

• Underi Fort is currently unprotected and partially in ruins.
• Due to its remote location, it is not a common tourist destination.
• The fort walls, bastions, and entrance gate remain intact, offering a glimpse of its historic significance.

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🚗 2. How to Reach Underi Fort

📍 Nearest Cities & Distances

Location	Distance from Underi Fort	Approx. Travel Time
Alibaug	6 km	20 minutes (by boat)
Mumbai	105 km	3.5 hours
Pune	160 km	4.5 hours

⛵ By Boat (Only Way to Reach)

• Underi Fort is accessible only by boat from Thal Beach (Alibaug).
• There are no regular boat services, so visitors must hire a private boat.
• Boats take around 20-30 minutes to reach the fort, depending on sea conditions.

🚖 By Road to Alibaug

• From Mumbai: Drive via the Mumbai-Goa Highway (NH-66) to Alibaug, then to Thal Beach.
• From Pune: Take Tamhini Ghat Road via Pen to Alibaug.
• From Mumbai (Sea Route): You can take a ferry from Gateway of India to Mandwa Jetty, then take a bus or taxi to Alibaug.

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🥾 3. Exploring Underi Fort

🗺️ Trekking & Difficulty

Route	Starting Point	Difficulty Level	Time Required
Thal Beach Boat Route	Thal Beach (Alibaug)	Moderate	20-30 minutes (by boat)

⏳ Best Time to Visit

✅ Winter (October - March) – Best time, calm sea and pleasant weather ❄️
✅ Post-Monsoon (September - October) – Ideal for a scenic boat ride 🌿
❌ Avoid Monsoon (June - August) – Rough seas, boat rides unavailable 🌊

🔍 Travel Tips

✔️ Hire a local fisherman’s boat since there are no regular ferry services.
✔️ Wear a life jacket during the boat ride.
✔️ Carry waterproof bags for valuables.

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🤩 4. Why You Must Visit Underi Fort?

✅ A Rare Siddi Naval Fort – One of the few forts built by the Siddis.
✅ Less Crowded & Unexplored – A hidden gem in Maharashtra’s coastal region.
✅ Scenic Views of the Arabian Sea – Offers panoramic views of the coastline.
✅ Adventure Experience – Accessible only by boat, making it a thrilling journey.
✅ Historic Fortifications – Explore ancient bastions, water tanks, and watchtowers.

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🏰 5. Important Fort Details

🚪 Fort Gates (Darwazas)

Gate Name	Significance
Main Entrance Gate	The only access point, still intact.

🛡️ Fort Towers & Structures

Structure	Significance
Fort Bastions	Used for placing cannons and defense.
Water Tanks	Large ancient reservoirs for water storage.
Watchtowers	Used to monitor enemy ships.

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🚨 6. When to Avoid Visiting Underi Fort

❌ During Monsoons (June-August) – Rough sea conditions, boat services unavailable.
❌ Without a Local Guide – Navigation is difficult due to its isolation.
❌ Late Evenings/Night – No lighting, unsafe due to sea waves.

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⚠️ 7. Who Should Avoid This Trip?

🚷 People with seasickness – The boat ride can be rough.
🚷 Elderly people & small kids – Uneven terrain and boat travel may be difficult.
🚷 People with fear of deep water – The fort is completely surrounded by the Arabian Sea.

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🎒 8. What to Carry for the Trip?

✔️ Waterproof bag for valuables.
✔️ Life jacket (provided by the boat operator).
✔️ Sunglasses, cap, and sunscreen (to protect from sun exposure).
✔️ Trekking shoes for walking around the fort.
✔️ Snacks & drinking water (no shops on the fort).
✔️ Camera & power bank (for capturing scenic views).

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💭 Final Thoughts

Underi Fort is a forgotten masterpiece of Maharashtra’s coastal history. Although it is not frequently visited, it remains a great place for history enthusiasts and adventure lovers who want to explore lesser-known sea forts.

📍 Plan your trip wisely, arrange a boat in advance, and experience the untouched beauty of Underi Fort! 🚤🏰