Translation of Bollwerk

He also told me that he had build his scooter by himself. I could not understand how a doctor was able to build such a machine on his own. It seems that the circumstances made people capable of many things.
I walked down the main street of the town and soon found out that there was a nice place not far from the main square. It cost around two hundred pesos which was equivalent to twenty US Dollars.
I spoke to my sister's friend and she told me I could stay at her place whenever I wanted. I then played Galaga on one of the computer machines and advanced to a very high level of the game.