This place would be interesting enough if only to watch the company's craftsmen at work making the renowned hand-blown crystal that bears the Val Saint Lambert label. But you'll find the remains of a 13th-century Cistercian abbey, a 16th-century Mosan Renaissance-style house, and examples of industrial archaeology from the 18th and 19th centuries. Even so, I think the admission is steep enough that you'd want to be pretty sure of your interest in crystalware before stumping up. An on-site store sells recently made crystal, including slightly flawed examples at a considerable discount. Visit the Musée du Cristal (Crystal Museum) and wander around the site.