Underi Fort
Off Thal, Alibaug, Raigad district
If you are doing the Alibaug sea forts, Underi is the quieter twin worth adding. Also called Jaidurg, this fortified island near Khanderi off Thal carries twelve bastions, rainwater ponds, palace remnants, scattered cannons and secret passages. The boat trip from Alibaug takes about 2 hours in total. It pairs naturally with Khanderi on the same outing. Pen is the mainland railhead, and October to March gives calm crossings.
Why go
- Twelve-bastion fortified island
- Rainwater ponds and palace remnants
- Secret passages and scattered cannons
Travel at a glance
How to reach
Reach Thal near Alibaug and hire a small local boat. Underi has no jetty and can be approached only at a suitable low tide; confirm conditions and return timing locally.
Nearest railway station
Pen
Things to carry
Underi has no jetty and boat landing is tide-dependent. Go only with an experienced local boat operator after confirming low tide, weather and return timing; avoid rough seas.
FAQs
What is Underi also called?
Jaidurg.
Why does timing matter?
The island has no jetty and landing is possible only at a suitable low tide.
What remains on the fort?
Twelve bastions, ponds, palace remnants, cannons and secret passages.