We came across Bellingham Estate last year and all we can say is WOW its beautiful.
Quoting from their website www. http://bellinghamestate.ie/
Bellingham Estate is a historic country estate located in the village of Castlebellingham, Co. Louth which offers luxury accommodation and fishing on the river Glyde. Enjoy the private unspoilt parkland setting which neighbours Bellingham Castle hotel, you will be free to explore the 70 acres of mature grounds, tree lined avenues and river walks.