Limerick is famous in Ireland for having borne the brunt of so many of its wars. But this role has also bestowed upon the city an incredible history often wrought in stone. King John’s castle, topping King’s Island and overlooking the River Shannon, gives visitors outstanding views of the city. Make sure to see St Mary’s Cathedral, Limerick’s oldest building (founded in the 12th century), and the Treaty Stone, upon which William of Orange signed for peace, which now sits on a grand pedestal to stop visitors from chipping parts away to sell or treasure for themselves.