Wolters made several trips abroad in connection with his duties for the GBI. He visited the United States to study advanced transport systems, and Paris for the 1937 international exposition there. In 1939, Joseph Goebbels appointed him Exhibition Commissioner. Wolters took charge of organizing German architectural exhibits presented in other countries. Until 1943, Wolters traveled to other European capitals, and in addition to his duties as commissioner, gathered political intelligence. On his return, Wolters passed along his insights to Speer and some of these thoughts reached Hitler's ears.