No.
Anyways...
Romanticism does not entirely revolve around nature. Basically, the Romantics (the composers at the time) were fed up with the social, cultural, political, ideological, and whatnot, changes occurring at the time (of the Industrial Revolution) but they weren't entirely conservative in that sense. They wanted society to develop in their own preferred way.
In Frankenstein, we can see the Romantic ideas expressed in Shelley's descriptions of the landscape (the Arctic, the Alps, England) which give a layer of the supernatural to the natural - this is the most well-known aspect of Romanticism. The technical term is "Natural Supernaturalism."
Also, in the novel, we can see two character archetypes that the Romantics identified with: the one represented by Frankenstein who indulges in his own self-interest (Captain Ahab is an example from another Romantic text, Moby Dick), and the one represented by the Monster: the beautiful soul in the ugly body (Remember the Ugly Duckling? Well, that's from the Romantic Period as well).
Finally, the prevalence of emotions as a method of transcendental communication. The emotions of fear (of the Monster) and awe (of the landscape and the Monster) in Frankenstein are an example of one of the staple aspects to Gothic literature, a sub-genre to Romantic literature.
There, enjoy.