The Serra da Arrábida Natural Park, amidst the deep blue sea and the green of the hills, is a breath-taking place.Situated by the sea, the park offers some of the most stunning coastal scenery in the Lisbon area. The highest point is in the Serra do Risco, a magnificent cliff 380m high. A good way of getting to know this pristine place, featuring pure Mediterranean vegetation, is this private tour. Like a wall of green sticking out over the Atlantic, the hills offer shelter to small coves of white sand where, despite being on the edge of the ocean, the sea is almost free of waves.