Terceira in a Day: Monte Brasil to Algar do Carvão and the Biscoitos Pools

The Best of Terceira Island is an eight-hour hiking and cultural loop across Terceira, one of Portugal’s Azores islands, beginning in Angra do Heroísmo. The route threads from the fortress slopes of Monte Brasil to coastal lookouts, volcanic caverns and cliffside natural pools, offering a compact introduction to the island’s geology and human history.

Start on Monte Brasil, a tuff cone of black basalt that shields Angra do Heroísmo and offers wide views over the harbor and Ilhéus das Cabras, twin sea stacks that puncture the Atlantic. The walk follows the coast toward the Miradouro da Serretinha, crossing the small freguesias of Ribeirinha and Feteira before skirting Porto Judeu and the sheltered curve of Baía da Salga, an important historical landmark in Portugal. Inland, a brief visit to the parish of São Sebastião showcases one of the Azores’ older churches and a glimpse into island life.

The trail climbs to Serra do Cume where fields fan out in the agricultural patchwork known locally as the "Manta de Retalhos," the largest caldeira landscape on the Azores, a striking example of volcanic soils shaped by centuries of farming. After a pause for lunch in Praia da Vitória, the route continues to Serra do Facho for panoramic views over the eastern coast, then down to the black-lava basins at the Piscinas Naturais dos Biscoitos—natural tidal pools rimmed by columnar and vesicular volcanic rock and framed by historic vineyards.

The highlight is Algar do Carvão, a vertical volcanic vent and accessible caldera chamber whose oxidized walls and subterranean lake read like a geological museum display. Walking into the Algar reveals stratified lava, mineral staining and a sense of scale that differentiates Terceira from more sedate Atlantic islands. Vineyards producing unique Azorean wines cling to slopes above the coastline, offering a human thread through the volcanic terrain.

Why book this excursion? It condenses Terceira’s diversity—coastal cliffs, agricultural highlands, natural pools, and a rare showpiece cavern—into a day that balances effort and discovery. Guides meet in Angra do Heroísmo and navigate a network of country roads and footpaths that are often too dispersed for independent self-guiding visitors. The combination of sea vistas, volcanic geology, and tangible cultural sites makes this a practical choice for anyone wanting an intensive primer on Terceira’s landscapes.

Expect roughly eight hours on varied terrain: paved miradouros, gravel lanes and short rocky scrambles around coastal pools. Moderate fitness and steady footwear are recommended; bring layered rain and sun protection plus a refillable water bottle. Respect posted signs at Algar do Carvão and the Biscoitos pools—these volcanic features are fragile and safety rails are limited. This loop delivers a concentrated taste of Terceira that pairs geological spectacle with wide ocean views and wonder.