📜 Lights mark the boundary of Rotterdam's 1940 bombing, encircling a 12-kilometer zone. This circle of lamps distinguishes modern and 18th-century architecture. # Why Go 💡 Witness a unique urban memorial marking a significant historical event. 🚶 Walk through Rotterdam's past and observe the architectural contrast between modern and 18th-century buildings. # Tips 📍 Easiest markers to spot are near the central station, next to the Doelen.