More than 60,000 soldiers of the armies of King James II and King William III fought in 1690 on this patch of farmland on the border of Counties Meath and Louth. William ultimately prevailed and James sailed off to France.
The battle site has an informative visitor centre and parkland walks. It's 6km west of Drogheda's town centre along Rathmullan Rd (follow the river). Buses run to/from Drogheda (€4.80, 20 minutes, two daily).
At the visitor centre you can watch a short film about the battle, see original and replica weaponry of the time, and explore a laser battlefield model. Self-guided walks through the parkland and battle site allow time to ponder the events that saw Protestant interests remain in Ireland. Costumed reenactments take place in summer.