A monument depicting the passage of Spanish conquistador Hernán Cortés into the Valley of Mexico in 1520, mounted on a roundabout that provides access in several directions: Tlamacas (closed since the 1990s), Izta-Popo Refuge, Xalitzintla, Iztaccíhuatl, and San Pedro Nexapa.
Its now-classic "Paso de Cortés" sign is a place where you can take a souvenir photo (of the achievement), which is currently obscure due to the countless stickers pasted by people from various cycling, motorcycling, mountaineering, and other clubs.
Here, in addition to the beautiful view, you'll also find plenty of food on weekends; during the week, it's difficult to find supplies.
The cold is usually very high, so always be prepared for the changes in mountain weather.