13881680 - Ancestral Puebloan ruins of Hovenweep Castle in the Hovenweep National Monument on the border of Colorado and Utah; Colorado, Utah, United States of America13884873 - Towers of silence on the mountainside in Ingushetia, against mountain backdrop; Republic of Ingushetia, Russia13881681 - Ancestral Puebloan ruins of the Twin Towers of the Square Tower Group in the Hovenweep National Monument on the border of Colorado and Utah; Colorado, Utah, United States of America71433264 - Stone turrets on the Formentor Peninsula, Mallorca, Spain14303600 - The Barbican, Alnwick Castle, Northumberland, England, United Kingdom, Europe14347151 - Cathedral of Evora, UNESCO World Heritage Site, Evora, Alentejo, Portugal, Europe71369512 - Landscape on the island of Vega, Norway
