The massive Château de Vincennes and surrounding grounds are the major tourist attraction here. A castle, a royal residence and a fortress, the chateau was built in the 12th Century and is the only royal residence that survives from Medieval times. Behind the chateau lies the sprawling Bois de Vincennes. It is the largest public park in Paris and contains Lake Daumesnil, the Parc Floral de Paris with more than 3,000 species of flowers and the National Museum of History of Immigration. Because of its size and the sheer variety of attractions you can easily spend more than a day exploring this area.
Barriere du Trone and the Colonnes du Trone in Paris are also impressive historic monuments and well worth a visit. Situated on the Place de la Nation, these two towering columns were built in 1787 and designed by Claude Nicolas Ledoux. You should also stop to admire the bronze statue Le Triomphe de la Republique located in the center of the Place de la Nation.