Translation of lentamente

for a minute I blamed the burger that I had eaten at the duty free back in Cancun, but thinking a little further I recalled eating street food the night earlier, as it was Mexican independence day.
In my opinion, this is another thing, it is rooted in history. People of different countries will always point to their neighbor's mistakes, a vicious cirlce arises which is very hard to avoid.
We walked by waterfalls and rivers, but the water was too cold to swimm in. The hike made us tired and we were in the valley, which meant that we had to climb up again. The climb was difficult.