Translation of regime in Spanish

On the drive into the city center we were a little shocked by the amount of motorcycles, by the pollution and stress in that city. After only two days in a small village we forgot how it was.
We continued to the entrance of Angkor Wat. They told us that if we would wait until after five o'clock we could enter with next day's ticket and still see the sunset. We waited and entered at five.
The same night we went to a great restaurant in town (near the main street). We met a very friendly couple in their fifties from Buenos Aires. They told us many interesting stories about Argentina.