Holy Hill Basilica and National Shrine of Mary Help of Christians is a Roman Catholic shrine in the north central United States, dedicated to the Blessed Virgin Mary. The centerpiece of the shrine is a minor basilica. It is located in the town of Erin, near Hubertus, Wisconsin, in the Roman Catholic Archdiocese of Milwaukee.
The shrine is located atop a high kame in 400 acres of woods. Visitors can climb a 178-step observation tower to view the Milwaukee skyline, about thirty miles southeast. At approximately 1,350 feet above sea level, it is one of the highest points in southeastern Wisconsin.