If you could see a 4,300 ft below ground level, the buildings would be there!

I had a similar problem viewing the 3D models near Temple Square, but the solution is to turn the 3D terrain off. The modeler, blueflame, must have had the 3D terrain turned off when he created them.

I had the opposite problem in Denver. Someone created a 3D model of a house. It looks fine with the 3D terrain turned on, but if you turn the terrain off the house is floating thousands of feet in the air.