The term 'bufón' refers to the sound produced by the air being expelled, which locals historically compared to the noise of a jester or animal.
The geyser effect only occurs during high tide and periods of significant swell; the phenomenon is silent during calm weather.
The chimneys are formed by the dissolution of Jurassic limestone, which is highly sensitive to the chemical action of seawater.
The site is part of a larger protected area that includes several other nearby bufón fields, such as those at Santiuste and Pría.
The internal conduits can reach depths of tens of meters below the cliff surface, creating an extensive network of sea caves.
The Bufones de Arenillas are a geological formation consisting of vertical sea chimneys that connect subterranean coastal caves to the surface. When the tide is high and the sea is rough, the pressure forces water and air through these narrow vents, shooting jets of seawater up to 20 meters into the air. The phenomenon creates a distinct roaring sound known as 'bramido'. These features are located within a protected natural area designated as a Natural Monument by the Government of Asturias. The landscape consists of rugged limestone cliffs shaped by karst erosion. It is one of the most accessible and impressive fields of sea geysers in the region.
From the designated viewing platforms along the coastal trail during high tide.
Check the tide tables before departing, as the geysers are inactive at low tide.
Stay on marked paths; the ground around the chimneys is often unstable and prone to sudden subsidence.
Bring binoculars for safely observing the spray from a distance during active periods.
Approaching the edges of the chimneys, as the ground can be slippery and structurally fragile.
Wear sturdy, closed-toe hiking shoes with good grip to navigate uneven, rocky terrain.
