Underi

{{Short description|Island in India}}

{{Use dmy dates|date=August 2017}}

{{Use Indian English|date=August 2017}}

{{Infobox military structure

|name = Underi

|partof =

|location = Raigad District, Maharashtra

|image =

|caption =

|map_type = India Maharashtra

|map_size =

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|type =

|coordinates = {{coord|18.705531|72.841281|type:landmark|display=inline}}

|code =

|built = {{Start date|1680}}

|builder = Siddis

|materials =

|height =

|used =

|demolished =

|condition =

|ownership = Government of India

|open_to_public = Yes

|controlledby = Siddis

|garrison =

|current_commander =

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Underi (also called Jaidurg) is a fortified island near the mouth of Mumbai harbour south of Prong's Lighthouse. It is a companion fort to Khanderi and currently lies in Raigad district, Maharashtra. These islands of Khanderi and Underi served as one of the landmarks for ships entering Mumbai harbour.{{cite book|publisher=Govt Central Press|date=1904|pages=[https://archive.org/details/gazetteerbombay22enthgoog/page/n413 395]–396|title=Gazetteer of the Bombay Presidency|url=https://archive.org/details/gazetteerbombay22enthgoog|quote=underi.|access-date=2009-03-19}} Underi is smaller than Khanderi.

The fortification was built by Kahim of the Siddis{{cite web|url=http://www.maharashtra.gov.in/english/gazetteer/KOLABA/places_Underi.html|title=Underi, The Gazetteers Department|publisher=Government of Maharashtra|access-date=2009-03-19}} in 1680 CE. {{cite web|url=http://www.fortsofsahyadri.friendsofforts.com/list_of_maharashtraforts.htm|title=Friends of Forts|access-date=2009-02-01|url-status=dead|archive-url=https://web.archive.org/web/20081207173737/http://www.fortsofsahyadri.friendsofforts.com/list_of_maharashtraforts.htm|archive-date=7 December 2008|df=dmy-all}}