Small pavilion designed by Victor Horta and housing the monumental sculpture "The Human Passions" by Jef Lambeaux. A dispute between the creators and a scandal over the artwork's controversial erotic and religious iconography caused it to be locked up and forgotten for decades, but it has been restored and opened to a limited public.
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Musée Royal de l'Armée et d'Histoire Militaire/Koninklijk Museum van het Leger en van de Militaire Geschiedenis
In the north wing of the Cinquantenaire Palace, this museum provides an overview of the development of military technology and of the major campaigns fought on Belgian territory. The museum has three principal sections: Belgian military history (documents, uniforms and weaponry from the Middle Ages to the present day, including a most comprehensive collection of medieval arms and armor); the Armored Vehicle Hall with artillery, tanks, etc. from the two World Wars; and the Air Section (Brussels Air Museum) with a collection of aircraft from World War I onwards. The Brussels Air Museum's high point is its collection of original aircraft from World War I.
Parc du Cinquantenaire/Jubelpark
This park with a monumental arch was developed in 1880 for the National Exhibition to commemorate the 50th anniversary of Belgium's independence. Definitely check out the Arc de Triomphe-Triomfboog on the east side of the park. It is possible to go up to the terrace above the arch, from where you'll have a good view of the city. Entry is through the Royal Museum of the Armed Forces and of Military History and is free, but a supplement must be paid for access to the arch. Any backpacks or luggage must be stored in small lockers at the entrance, so don't take too many belongings along if you plan to enter the museum. The arch is beautifully lit at night, and usually less crowded.
Musée Art & Histoire/Museum Kunst & Geschiedenis
Part of the Koninklijke Musea voor Kunst en Geschiedenis (KMKG) - Musées Royaux d'Art et d'Histoire (MRAH) (Royal Museums of Art and History) group of museums. This museum has an important collection of art objects from different civilizations from all over the world. The museum was founded in 1835 and was in the Hallepoort/Porte de Hal, one of the last remaining medieval city gates of Brussels. The gate is still operated as a separate museum by the same museum foundation.
Automobiles from the dawn of the motoring age to 1970s including the earliest Mercedes, Renaults, BMW Isettas, Tatras, Ford T-birds, even a jeepney from the Philippines.