'Baile na dTri Chaislean' : Castle

Grid RefO 012 156
Longitude6° 29' 9.94" W
Latitude53° 10' 52.53" N
ITM east480366
ITM north584435
Nearest TownBlessington (3.6 Km)
OS Sheet56
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 9th September 2001

I actually passed this place after taking a wrong turn. The remaining keep is quite nice and there are picnic benches for your enjoyment.

The place is called Threecastles but a sign tells you that they don't know where the other two were.

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Like this monument

Marked Sites


From Blessington follow the road north around the reservior. The castle is on the right after about 3km. You can't miss it.

Random Gazetteer

A Selection of Other Castles

About Coordinates Displayed

This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.

Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.

Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.

The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.

UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.

ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.

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