There are mountain ranges and sets of rocky elevations in practically all around the city , being the most remarkable and impressive of the Serra do Mar ( Portuguese for `` Mountain Range of the Sea '' ) , located in the east that separates the plateau from the coast of ParanÃ . There are mountain ranges and sets of rocky hills practically all around the city , the most remarkable and impressive being the Serra do Mar ( Portuguese for `` Mountain Range of the Sea '' ) , located in the east that separates the plateau from the coast of ParanÃ .