Morro do Boi is a small coastal hill with a short ecological trail leading toward quiet beaches and fishing spots. At about 160 metres high, it is not a major climb, but it gives a good change of pace from the busier beachfronts around Guaratuba and Matinhos.
The appeal is simple: Atlantic forest, sea air, and a bit of height above the coast. Wear shoes with grip if it has rained, and treat it as a nature walk rather than a serviced attraction.