The Cinquantenaire is a must-see place when you visit Brussels. It was built by King Leopold II to celebrate the fiftieth Belgian independence on 1880. From far, it looks like Brandenburg Gate in Berlin but unfortunately Cinquantenaire is less popular even though it offers a beautiful park, ponds and also some museums. For me, this is one of beautiful place in Brussels.
Tips from me: Do not miss the very nice view on Brussels from the top of Triumphal Arch if you visit this place. It's worth it :-)
Photo was taken with Motorola G4 (smartphone camera).