Pico Island and the Azores Triangle: history, myths and science

Short answer

The Azores Triangle—Pico, Faial and São Jorge—sits in a tectonically complex part of the North Atlantic near the meeting of the North American, Eurasian and Nubian plates. Volcanism built the islands; people later reshaped them through settlement, vineyards, whaling and inter-island exchange. The documentary story begins with Portuguese exploration and settlement in the fifteenth century, while new environmental research raises a debated possibility of earlier human presence.

A careful human timeline

Read this as a Pico timeline within two wider stories: the Azores grew as a Portuguese Atlantic archipelago, and major changes in Portugal also reshaped island government, trade and identity. Some national turning points happened on other islands—especially Terceira—but belong to the context needed to understand Pico.

The UNESCO property preserves a working system of small plots enclosed by dry-stone basalt walls. These currais protect vines from wind and salt. The listed property covers 987 hectares with a 1,924-hectare buffer, and its history reaches back to the island’s fifteenth-century settlement. Its nineteenth-century peak, later vine diseases and subsequent recovery are part of a living landscape—not a frozen museum scene.

Myth versus evidence

“The Azores are the remains of Atlantis”

This is a compelling modern association, not an accepted archaeological conclusion. Current geology explains Pico, Faial and São Jorge as oceanic volcanic islands in an active plate-boundary region. No accepted body of archaeological evidence identifies the archipelago as Plato’s Atlantis. The story belongs to cultural imagination unless new evidence changes the scholarly picture.

“Pico is the world’s tallest mountain when measured from the seabed”

Pico is 2,351 metres above sea level. The Azores Geopark states that the volcano rises about 3,500 metres above the surrounding seafloor and describes it as the third-largest volcano in the North Atlantic. Adding an underwater foundation helps explain scale, but there is no single universally applied “tallest from base” method across mountains and volcanoes. The precise, defensible claim is that Pico is Portugal’s highest point and a very large oceanic volcano.

“The Azores have four seasons in one day”

The phrase captures lived experience but is not a scientific climate classification. Maritime airflow, changing fronts, altitude and steep island topography can create rapid local variation in cloud, shower, wind and sun. It is useful packing advice—carry layers and waterproof protection—but not a literal meteorological rule.

“People certainly lived here centuries before the Portuguese”

A 2021 multiproxy study reported signs of widespread human disturbance dated approximately 700–850 CE, several centuries before Portuguese documentary settlement. The authors found the pattern consistent with possible earlier visitors, including a possible Norse context. This is important research, but interpreting environmental proxies as proof of a particular people or permanent colony remains debated. The safe wording is that evidence for pre-Portuguese human influence is under active scientific discussion.

The Azores first: three groups and nine islands

Before focusing on Pico, place it within the whole archipelago. The nine Azorean islands are arranged from west to east in three geographic groups:

• Western Group: Flores is known for crater lakes, waterfalls and a deeply cut green landscape; Corvo is the smallest island and is dominated by the Caldeirão volcanic crater.
• Central Group: Faial combines Horta’s maritime history with the young land of Capelinhos; Pico is defined by Portugal’s highest mountain and its vineyard landscape; São Jorge follows a long volcanic ridge above distinctive coastal fajãs; Graciosa has a gentler profile and the Furna do Enxofre; and Terceira joins the historic city of Angra do Heroísmo to a volcanic interior.
• Eastern Group: São Miguel is the largest island, with major crater lakes and geothermal landscapes; Santa Maria is the oldest Azorean island and stands apart through its generally drier scenery, pale beaches and exposed sedimentary rocks.

The Azores Triangle is not a fourth group. It is the close relationship formed by Pico, Faial and São Jorge within the Central Group. Starting with all nine islands, then narrowing to these three neighbours, gives the geography that follows a clear scale: archipelago, group, Triangle and finally Pico.

Why three islands form a “Triangle”

Pico, Faial and São Jorge are called the Triangle because short sea passages connect their positions in the Central Group. The name is geographic and cultural, not a separate geological plate.

Geodesy describes the wider Azores as a diffuse triple-junction region involving the North American, Eurasian and Nubian plates. A 2022 GPS study estimated roughly 4.2–4.8 millimetres per year of spreading across the Eurasian–Nubian boundary in the studied area. That slow movement is meaningful over geological time; it is not a day-to-day forecast of earthquakes or eruptions.

For live seismic and volcanic information, use the Azores’ official monitoring services rather than an evergreen travel article.

Three volcanic islands, three different records

Pico is a 2,351-metre stratovolcano—the highest point in Portugal—built above oceanic crust and accompanied by fissure systems. Documented historic eruptions occurred in 1562–64, 1718 and 1720. The 1562–64 event associated with Mistério da Prainha is described by the Azores Geopark as the longest reported eruption in Azorean history. “Mistério” became a local name for lava-created terrain whose origin was mysterious to communities living through it.

Faial’s most famous modern event began at Capelinhos on 27 September 1957 and continued until 24 October 1958. Explosive and effusive phases created new land that joined Faial. A 1672–73 eruption had already affected the island’s western side. Capelinhos remains a powerful place to see how quickly a coast can change.

São Jorge is a long basaltic fissure island with steep cliffs and coastal fajãs. Confirmed events include the 1580 eruption, whose flows reached the sea; activity in 1808 involving explosions and lava; and a confirmed submarine event in 1902. Fajãs can form through lava reaching the coast or through collapses and sediment processes, so they do not all share one origin.

How science changes the way you visit

At Criação Velha, basalt walls are not decoration: they record adaptation to young rock, wind and salt. At Capelinhos, the contrast between older green land and the dark 1957–58 deposits makes geological time visible. On São Jorge, fajãs show how lava, slope failure and coastal processes make limited flat land that communities then learned to use.

History also changes the view. Whaling museums preserve a difficult economic era and the knowledge that later helped islanders develop non-lethal whale watching. Harbours record movement among the Triangle islands; vineyards record work, trade, disease and recovery.

The responsible way to tell these stories is to keep dates, sources and uncertainty attached. Myth can enrich a journey, but it should not replace evidence—and science becomes more memorable when it is connected to the places people can actually see.