Hard to fix without knowing wjat you are trying to say. But "The Balfron Tower: aspirations and failures" is more correct in terms style.

Hi Julija, I would rewrite it like this: The Aspirations and Failures of Balfron Tower. Alternatively, Balfron Tower's Aspirations and Failures Capitalise the first word and the important words (nouns, main verbs, adjectives) in the title. I'm not sure about using "Aspiration," though. "Objectives" might be a better word. If you are talking about what the goals of Balfron Tower were, and how they weren't achieved, then I think that "objectives" is better.

The Balfron tower aspirations and failures. I think that you should delete the word "the" before failures .