The prasat itself is like five concentric square towers, each consecutively taller than the other. The outer, middle and center towers are capped by cast iron spires, which gives the temple its name. The two interstitial towers are capped by open walk ways lined with shrines. Visitors to the prasat are requested to make a 20 Baht (0.62 USD) in box just inside the entrance gate at the base of the structure.At the ground level the thick laterite columns supporting the towers form an almost maze like collection of corridors. Although youre always within sight of the outside, it worth taking a little time to get lost in the corridors on your way to the massive spiral stairway up the center tower. In late 2007, an installation describing the history of the structure was put on display in some of the corridors.
All of the text is in Thai, but there are plenty of pictures.The staircase is constructed as a free standing metal center column with thick wood treads cantilevered off it. You can choose to climb all five stories at once or get off at any level to explore. The stairway actually ends on the roof of the fourth tower. Here there is an outside walkway from which you can see the golden Mount across the street, as well as the park in front of the temple. From the walkway you can climb one last stairway to view the shrine at the top of the temple.