The Adventurer's Guild was located at the northwestern side, right outside the Kingdom's wall. By foot, it would take around two to three minutes to arrive at the northern gate of the kingdom. While it would take around ten to twenty minutes to arrive at the western gate of the kingdom.
This was made so because Pedro had his residence located in the northern part of the Kingdom. Thus, the Adventurer's Guild was placed at the nearest gate—which was the northern gate, in consideration for Pedro.
It was a well-thought idea by Duke Ersi and Duke Albert. That said, it did not matter much to Pedro. After all, Pedro could even cross a mountain in several minutes, what much more walking around the Kingdom.
Going back to the Adventurer's Guild, since it was the first time that such an organization would be established, Pedro did not have an idea regarding the setup or arrangement of the land area that was usually arranged for an Adventurer's Guild.