Signs of Allah in creation and ruins

أَوَلَمْ يَهْدِ لَهُمْ كَمْ أَهْلَكْنَا مِن قَبْلِهِم مِّنَ ٱلْقُرُونِ يَمْشُونَ فِى مَسَـٰكِنِهِمْ ۚ إِنَّ فِى ذَٰلِكَ لَـَٔايَـٰتٍ ۖ أَفَلَا يَسْمَعُونَ

Has it not become clear to them how many generations We destroyed before them, [as] they walk among their dwellings? Indeed in that are signs; then do they not hear?