One year after the Eiffel Tower was erected in Paris, London started a design contest to create something even better — and The Public Domain Review has published an illustrated catalog from 1890 that details all 68 entries in the "Great Tower for London" competition. While many of the designs look quite a bit like the iconic French landmark, others are much more elaborate and outlandish. Entry number six even suggests using a locomotive to ferry visitors up its twisting spiral design. According to the Review, entry 37 was the ultimate winner, and construction began two years later, though financial difficulties meant it was never completed.