The beguinage in Lier has been a UNESCO World Heritage Site since 1998.

It is a typical 13th century street beguinage with 11 narrow streets and 162 small houses. The front doors of the houses feature the name of a saint or a biblical scene. Most of the houses date from the 17-18th century. Some of them have typical forecourts and gates. In the heart of the you lies the St. Margaret's Church.