



Undergroundkent Is...
A site dedicated to the many underground features that can be found not just in
Kent but in other areas. They are mostly military fortifications that have been
built over the last three centuries, but other features that included tunnels can
also be found here. All sites are man made, or in the case of mines, heavily influenced
by industrial usage. The aim is to provide a glimpse into the rarely seen and often
ignored world that exists beneath our feet.
Here you will find information on Kent History, Kent Defences, Dover Defences, fortifications
and tunnels in Dover, Medway, Sheppey, Thanet, Grain and other areas.
Who Are Undergroundkent....
Underground Kent is not a club or organisation – it’s a collection of people interested in exploring and documenting underground and military sites in Kent.
We work closely with many organisations and national bodies and have obtained permission to visit many ‘off limits’ sites. Other sites that have been explored may be abandoned and open to the elements.
We do not encourage anyone to enter these places and risk injury to themselves and others. These sites are dangerous and can be prone to collapse. If you do visit any of these places, make sure you are thoroughly equipped i.e. torches, hard hats, good footwear etc., and never go alone. The best thing to do is just enjoy the sites on your monitor.
Publishing my images without seeking prior permission is an infringement of the Copyright, Designs and Patents Act, 1988. Using my images without acknowledging myself as the source is an infringement of the Copyright, Designs and Patents Act, 1988.
Grain Fort
The Isle of Grain has long been of strategic importance for safeguarding the entrance to the River Medway and the 1860 Royal Commission called for a casemated fort around the existing Grain Tower.
Project Redsands
Underground Kent supports Project Redsand, and gratefully acknowledges the help and assistance in our visits to the fort.
Project Redsand is doing an excellent job in conserving and restoring these fascinating structures. Please visit the Project Redsand site.
03.11.09
Garrison Point Fort PDF Updated 
08.10.09
Alland Grange Chalk Mine Updated 
08.10.09
High Down Rocket Test Site
10.10.09
Garrision Point Fort PDF
19.08.09
Maunsell Sea Forts PDF
Grain Battery Tower
Grain Fort
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