Parque Natural de la Sierra de la Muela, Cabo Tiñoso y Roldán covers 17,493 hectares in the far southeastern corner of the Región de Murcia, between the municipalities of Cartagena and Mazarrón. This mountain strip drops directly into the Mediterranean Sea, producing one of the sharpest coastal profiles on the Spanish coastline: from the peak of Morrón de Matanzas at 878 metres, the eye falls almost vertically to cliffs rising more than 150 metres above the water.
The park organises two distinct orographic systems. To the north, Sierra de la Muela presents east-west limestone ridges whose arid slopes support rosemary, esparto grass and dwarf palms (Chamaerops humilis) in a low, dense mat. To the south, Cabo Tiñoso juts into the Mediterranean like a spur: its 361-metre summit hosts one of the most significant coastal artillery batteries in Spain, built between 1926 and 1936 to defend the Arsenal of Cartagena. The bedrock here consists of phyllites and schists from the Maláguide Complex, more than 250 million years old. Sierra de Roldán closes the ensemble to the west at 448 metres, forming a natural amphitheatre facing the Bahía de Mazarrón.
The park's flora catalogues adaptations to drought and salt stress. Wild jujube (Ziziphus lotus) forms dense thickets in the lower ravines—regarded as a relic of the ancient Tethys Sea—while narrow-leaved silk vine (Periploca angustifolia) grows in rock crevices. On rocky faces, the Iberian endemic Sarcocapnos saetabensis threads through cracks. The sea adds a second dimension: Posidonia oceanica meadows cover the seabed to 30 metres with 600-800 shoots per square metre, and the marine zone protects red coral (Corallium rubrum) colonies in Cabo Tiñoso's submarine caves.
The vertebrate fauna includes the common chameleon (Chamaeleo chamaeleon), whose southeastern Iberian population is one of Spain's most isolated; the eagle owl (Bubo bubo), which nests in vertical cliff faces; and the spur-thighed tortoise (Testudo graeca), found on stony slopes with scattered scrub. Waters off the cape regularly host striped dolphins (Stenella coeruleoalba) between May and September, and occasionally fin whales (Balaenoptera physalus) on their western Mediterranean migration routes.
The signposted trail network totals 45 kilometres. The Sendero de los Gigantes (8.7 km, medium difficulty) links the Morrón de Matanzas viewpoint with the tip of Cabo Tiñoso, accumulating 520 metres of ascent. Photographers are drawn to the lighthouse at Cabo Tiñoso—in operation since 1863—where early morning light catches the black phyllite slopes of the eastern face, creating tonal contrasts that landscape photographers specifically seek from October to December, when post-rain air clarity is at its best.
