As you approach the end of the scenic portion of the Apache Trail, you come to the Roosevelt Dam. The dam is the reason the road was built in the first place, serving as a supply route for construction supplies.
The Roosevelt Lake Bridge is just above the dam, and carries Arizona route 188 across the water. Before the bridge was completed, traffic had to drive across the top of the dam. You’re not allowed to do that anymore.
Note: This trip was first published in 2005.