A stroll through the 32-acre historic city park featuring serene ponds and fountains, tree-lined walks, Art Deco lamp posts, and statues brings visitors to the 19th-century Royal Palace. The official palace of the King and Queen of Belgium is open for tours in the summer months. A highlight of any visit is the spectacular Hall of Mirrors, featuring a ceiling created with 1.6 million iridescent green jewel scarab beetle shells.