My idea is simple: Add some tile bonuses that can strengthen two different types of structure. One that I thought of was this.

"Waterfall: There is an unusually large waterfall on this planet, believed to be one of the largest in the galaxy. Tourists will fly hundreds of light years to see this wonder. However, this massive waterfall has tons of energy potential; we could build a hydroelectric plant here. You will receive a 100% bonus to any cultural centers built here OR an additional 25% bonus to planetary manufacturing if a power plant is built here."

This would allow players to have more customization when developing planets. I know I always feel disappointed when I am forced to pass on a tile bonus for some reason or another. Thoughts?