Translation of arbalest in German

Then we went to a street where most backpackers would hang out as we wanted to make reservation for a trip that we planned for the next day. There were a lot of travel agents on that street.
We joined the mass and climbed it. The stones were a little slippery and I doubt that this place is accident free. Climbing big slippery stones was not an easy task but we managed it slowly.
The next day we had to take the bus in order to get back to the airport in Calama. When we arrived at the airport was empty and no counter was open yet. We had to wait for 4 hours.