The storyline romanticizes and draws on an exotic setting in some episodes.

Within a few decades, the caves became famous for their exotic setting, impressive architecture, and above all their exceptional, all but unique paintings.

Both scores were left unfinished, both enjoy exotic settings, both are hybrid forms, respectively singspiel and semi-opera.

Bigger and glossier, they were fewer but more varied, often with period or exotic settings.

Both feature adventures in exotic settings, but space opera emphasizes space travel, while planetary romances focus on alien worlds.