"This landmark, located in the heart of Mexico City, commemorates the Mexican Revolution and is the largest triumphal arch in the world. The main structure evolved over twenty-five years of stops and starts and a major redesign. It was finished in 1938, to comprise an eclectic blend of art-deco and Mexican socialist realism styles. A visit to the top observation deck only costs 110 pesos ($5) and there's a museum underground. You don't need much time to witness the glory of the monument. Saunter around, gawk at the creative architectural stylings of the structure, and walk under the arches. History nerds may be more interested in the small museum below, but more than anything it's an architecturally significant piece, and the observation deck has great views. If you keep your eyes peeled while exploring around town, you'll most likely catch a glimpse of the monument down a main street—but a quick glimpse isn't enough, and it's worth the quick 15-minute trip to walk underneath it." - Scarlett Lindeman