Discover the volcanos and volcanic caves of Terceira Island on this geology lover's guided tour. Visit Algar do Carvão, Furnas do Enxofre and Gruta do Natal with an expert guide. Meet your guide and driver for pick-up at your hotel and head to the first stop on the tour — the inactive Algar do Carvão. Visit it from the inside and discover its small lake and fascinating geological formations. Next head to Furnas do Enxofre, a small strip of land with 20 fumaroles expelling white vapor into the air. You'll also see native flora like the Azores juniper and the Azores blueberry. Top off your tour with a visit to Gruta do Natal (Christmas Cave), a system of caves known as a lava tube, full of spectacular volcanic formations.

Explore all the main attractions of Terceira Island on this convenient half-day tour. Marvel at the Azores native vegetation and Terceira Island bulls dotting the nearby agriculture fields. Go to the Serra do Cume viewpoint, see the volcanic-formed swimming pools of Biscoitos and also you have the option of visiting Algar do Carvao volcano because we can adapt the tour according to your wishes! Enjoy the convenience of a pickup from the city of Angra do Heroísmo. Start the tour with a visit to Monte Brasil. Observe the UNESCO World Heritage City of Angra do Heroísmo from above. Enjoy a full view of the city, the mountains and surrounding villages. After a short drive through the city, continue along the southeastern shore of the island. Pass by the villages of Ribeirinha, Feteira, Porto Judeu and São Sebastião. See all the focal attractions along the way, such as the Goat's Islets and the oldest church in Terceira. Move to your next stop, Serra do Cume. Admire the island's oldest and largest Caldeira and colorful countryside. This viewpoint in the mountain range of Serra do Cume overlooks the patchwork of green pastures, forming "The Stitch Blanket". Pay a short visit to Praia da Vitória, its historical center. Finally, make a stop in the village of Biscoitos to see vineyards. Appreciate the waves in natural swimming pools, located in the northernmost part of the island. At the end of the tour, get dropped off to your accommodation, or any other place in Angra do Heroísmo.