Orihuela old town grows around San Miguel Mountain; not very big, up in this mountain repose the ruins of the antique arab castle.
Before, in the middle of the mountain, there is a important Seminary with more 250 years of history in a big building.
You may take a road from center old town (Subida al Seminario) (can walk or drive) and between Seminary can enjoy the nice views of Orihuela and Segura River fertile valley. After, walking, medium dificult, can go up to arab ruins castle...and see more views.
During Franco's regime, Miguel Hernandez became, a s in the Orwellian novel, a non-person. His poems were banned, as it was banned all things related to the Republic. In recent years, the local governemt of Orihuela got aware of the universal character of Hernandez. The house where he lived with his family became a museum. A quite place where to get in touch with the inspiration to his more romantics poems. Hernandez lived for the freedom (Para la Libertad. Sangro, lucho, pervivo. Para la LIbertad!)
Ask locals for directions. One in every 20 would tell you. Pro's: you improve your Spanish.
Con's: It takes time to find the place.(-;