Discovered in 1947, these are the largest caves in Portugal. They are configured like a gallery/room/well and their formation is due to erosion and to tectonic changes. There are subterranean lakes and rooms with lovely calcareous formations. There are two elevators and a depth of 110 metres. Here one finds the Grande Lagoa (Large Lagoon), formed by the Rio Negro (Black River), a subterranean water course that, in the winter, forms the Mira de Aire Lagoon.

It covers a total of 22 parishes, distributed by the counties of Arcos de Valdevez, Melgaço, Montalegre, Ponte da Barca and Terras de Bouro. National Park and Protected Area since 1971, extends from the plateau of the Castro Laboreiro to the one of Mourela, with a vast fauna and flora, being a favorite stage for outdoor activities. Usually accessible by car, it is known for the rugged relief and steep slopes, being a mainly granite region. You can take several routes, on foot or by car, and enjoy the scenery that offers a true journey through nature, past and adventure.

Pedestrian walk in perfect touch with nature.

This set of two caves is located on the left bank of the Arade river estuary. The biggest of them is 100 metres long and the smallest only a few tens of metres. It is a place where archaeological vestiges of the copper and bronze ages have been found. The largest cave is visited by many tourists. It has large, tall rooms, up to six metres, and a shallow lake.

This space is of great geological significance, in addition to the interest for being breeding grounds for some colonies of seabirds.

In this pleasant green area we find a small fishing port and a natural pool. Classified as a Natural Reserve, is surrounded by volcanic rocks, protecting holidaymakers from the wind. This is where lies the chapel of our Lady of the angels, the famous place where Christopher Columbus stopped to pray during the return voyage of the discovery of America in 1493.

This route starts next to the Church of the Holy Spirit, in the parish of Holy Spirit, follow until you reach the Waterfall on the River of Aveiro. After passing through the tip of the Castle towards the locality of Maia, until you reach the Lighthouse of Gonçalo Velho. There you will find a way of standing desk that descends to the sea, along which you can observe several species of local flora, as well as a magnificent view of the coast of Malbusca. Getting there below you will find the ruins of an old factory of the whale, and …

This route starts next to the captain's Pond, located in the central highlands in the interior of the island of Pico. The first part of the trail is performed on a dirt path until you reach the Head of the little prick. Here you get wonderful views of the North coast of the island of Pico, the final destination of the journey – from the Peak.

Circular footpath that passes near the Serra da Nogueira, allowing you to meet the mother church, the churches of Martim and Refoios, the chapels of St. Euphemia and Santa Luzia and some watermills.

The path of the Stone Wing provides a visit to one of the largest megalithic monuments of Alandroal.