When they crossed the last bridge and passed through the last gateway into the inner courtyard of Kronborg, Greta stopped in surprise. "Oh, Anna, it's so large and so beautiful." Then, just to show that she wasn't really afraid of climbing, she asked, "Tante Elsie, do you suppose we could climb to the top of one of the towers?"

"Yes, I think so."

From the little balcony on the tower they looked out over the ocean.

"Is that an island across the water?" asked Greta.

"Oh, no, Greta. That is Sweden, only three miles away. In the olden days, Kronborg was a fortress that guarded the entrance to the Baltic Sea. All the ships that came from the North Sea into the Kattegat and then into the Baltic had to pass this point of land, and every ship that went by here had to pay money to Denmark. Up here in this very tower there were guards who watched all the ships to see that every one stopped and paid for the privilege of going past this point. In those days, Kronborg was the most important castle in Denmark."

"Don't they have to pay this money now?"

"No. About a hundred years ago Denmark stopped asking for this payment. Ships that are going to the Baltic Sea can now go through the Kiel Canal in Germany, instead of going all the way around Denmark," explained Anna's mother.

As they walked down the narrow, winding stairs, Anna suddenly exclaimed, "Oh, Mother, we forgot to tell Greta why Kronborg is still an important castle."

"Maybe she already knows."