Sohaib (Radiallahu-anhu) narrates that whenever Prophet (Sallallahu-alaihi-wassallam) intended to enter a town, on seeing the town, he invoked:

اللَّهُـمَّ رَبَّ السَّمَوَاتِ السَّبْعِ وَمَـا أَظْلَلْنَ ، وَرَبَّ الأَرَاضِيْـنَ السَّبْعِ وَمَـا أَقْلَلْنَ ، وَرَبَّ الشَّـيَاطِيْنَ وَمَا أَضْلَلْنَ وَرَبَّ الرِّياَحِ وَمَا ذَرَيْنَ. أَسْـأَلُكَ خَيْرَ هَذِهِ الْقَرْيةِ وَخَيْرَ أَهْلِهَا وَخَيْرَ مَا فِيْهَا ، وَأَعُوْذُ بِكَ مِنْ شَرِّهَا وَشَرِّ أَهْلِهَا ، وَشَرِّ مَا فِيْهَا.

‘O Allah, Rabb of the seven heavens and all that they envelop, Rabb of the seven earths and all that they carry, Rabb of the devils and all whom they misguide, Rabb of the winds and all whom they whisk away. I ask You for the goodness of this town, the goodness of its inhabitants and for all the goodness found within it and I take refuge with You from the evil of this town, the evil of it's inhabitants and from all the evil found within it.'

(Mustadrak Hakim)