There are many different phrases and synonyms that can be used to describe the concept of "wide worlds." Some possible options might include "vast expanses," "grand horizons," "far-reaching landscapes," or "limitless domains." Other options might include "endless possibilities," "untold opportunities," "exploratory frontiers," or "infinite arenas." Each of these phrases captures a slightly different nuance or aspect of the idea of a broad and expansive world or landscape. Depending on the context and tone of the writing, one phrase or another might be more appropriate or effective in conveying the intended meaning and message.