The de facto tripoint border between Cyprus, United Kingdom and the United Nations was according to GPS located at 
34° 59' 53,016"N 33° 42' 03"E, very close to the A3 Larnaca - Agia Napa Highway.

The Geosite editor at the first documented Cyprus tripoint marker.

It may be a bit hard to see from the highway due to vegetation.

Photographed in direction towards Cyprus.

Photographed towards northwest, along the CY-UN blueline border. 

Close-up from top.

Trimarker top plate.

Towards the UK territory.

Sources
1. –