County Limerick lies on a fertile limestone plain divided by hills and ridges that has been inhabited for thousands of years, as shown by Neolithic remains and over 400 Norman castles. The area also contains Georgian houses built by English and Scottish settlers in the 1600s. The main city of Limerick has undergone development and offers restaurants, bars, and the Hunt Museum. County Clare contains rich rolling hills and green fields leading to the rocky coast or the unique karst landscape of the Burren, known for its caves and climbers. Along the coast are the stunning Cliffs of Moher, and inland lies Ennis and historic sites like Bunratty Castle.