Well it has been a long time since I made a cake involving this much detail...so it took me about 4 hours to complete. It is completely decorated with cream cheese frosting.
To start I placed a complete 11x13 cake as the base and then put I 9in round cake covering just less then half of the 11x13 to create the hill the tower will sit on. Then I cut away the excess 9in round and frosted it all in a light green.
Next, I frosted on the river and inserted the paper towel roll (covered in aluminum foil) for the tower. I was going to use cup cakes for the tower but I decided that it would not be stable enough when transporting.
Next, I frosted the tower. This included a the "stones" and vines of the tower. I also added small leaves for flowers on the grass.
Here is a close up of the tower showing the leaves on the vines.
Next, I add pink dots for flowers on the tower vines and the leaves on the grass. Also, I added the shore to the river for some added detail.
Here is a close up of the top of the tower which is made with 3 cup cakes. I placed them on a octagon base that was slightly bigger then the top of a cup cake. Notice that it is on top of a Mt. Dew can...this is what kept me going until 4am to finish this beast.
Here is the top of the tower placed on the the cake.
Okay, time for the finishing touches! Rapunzel's golden hair flowing out of the tower window.
I decided to continue Rapunzel's hair and have it form the words on the cake. I liked the idea but I was so tired by this point that the writing wasn't my best. But it still looked decent.
So, there you have it. I was pleased with how it turned out but I think it is time that I learned how to work with fondant for the next time I make a cake similar to this.