Brussels, Belgium’s cosmopolitan capital, blends Art Nouveau architecture with EU institutions. Marvel at Grand Place’s gilded guildhalls, Atomium’s futuristic spheres, and Manneken Pis cheekiness. Savor moules-frites, waffles in Marolles, chocolate shops. Mild 5–22°C; spring (Apr–Jun) & fall (Sep–Oct) ideal for lace-like parks and beer festivals.