Draw a vertical center line
Sketch a small rectangle at the base
Add two wide slanting lines upward from the base corners
Curve the lower sides slightly inward
Draw a large arch opening in the lower middle
Add a second smaller arch above the first
Extend the tower upward with narrower slanting lines
Draw the first platform across the tower
Add diagonal cross-bracing inside the lower section
Continue narrowing the structure above the first platform
Draw the second platform across the tower
Add more cross-bracing in the middle section
Taper the tower into a thin upper section
Draw the top platform near the peak
Add the antenna at the top
Refine the legs, arches, and platforms
Erase extra guide lines
Darken the final outline
Add simple shading or line details if desired