前置詞

When I was in Europe last summer、my bag was snatched How did it happen？Well、I was in Paris and I took a taxi for the Eiffel Tower。After I got off the taxi、a beautiful young girl asked me ifI would take her picture in front the tower。Of course、I said yes。I put my backpack to the ground。The woman gave me her camera and then started walking toward to the tower。の文章中の前置詞に関する間違いを教えてください。