Plaza 14 de Septiembre is just one of the landmarks located 0.5 mi (0.8 km) from central Tiwanaku, so you might want to stop by for a few pics during your trip.
If museums are on your list of things to see, then you might want to head to Lithic Museum, located in the heart of Tiahuanaco.If you want to experience more of the culture Tiahuanaco has to offer, head to Tiwanaku.