Impossible to say so making a few guesses
Keel East (Slievemore) (Court Tomb)
Beltany stone Circle
Doonmanagh (Puicin an Chairn) Wedge Tomb
Temple of Deen Court tomb
Crannagh wedge tomb
Berneens Wedge Tomb

Abroad
1, Cromeleque dos Almendres
2, Cromeleque do Xarez

Most amazing place
The Burren