Translation of verschlacken

Yesterday, I heard a very good example to explain my point: On their journey more than ten years ago, the presidential couple Mr. and Mrs. Clinton visited Egypt. They were welcomed by the president.
We had time to walk around the waterfall but refrained from entering the little lake at the bottom. My fellow tourtakers were quiet nice and we spend a while just sitting in the grass near the water.
Although the travel guide book mentioned a three star hotel we did not even had to enter the lobby in order to see that we would not sleep there. So we picked another recommendation and drove on.