Château Lacave is a medieval-style fortress located in the wine region of Caxias do Sul, Brazil, designed as a replica of an 11th-century Spanish monastery. Constructed from 1968 to 1978 by Uruguayan entrepreneur Juan Carrau using native basalt stone fitted without cement, the castle features four towers and distinctive medieval architectural characteristics. The structure was acquired by the Basso family in 2001 and operated as a winery until 2012, representing an ambitious attempt to recreate Old World European architectural heritage within a Brazilian wine-producing region. Since 2021, the castle has belonged to the Famiglia Valduga winery group, which plans to develop the site as a wine tourism destination, though the castle is currently closed to visitors.