Algar do Carvão

Name: Algar do Carvão
Telephone: +351295212992

Unique volcanic chimney and vent formed by a strombolian volcano, reaching a depth of approximately 100 meters. It features rare silica-based stalactites and a subterranean lagoon with crystal-clear water. Tovább…

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Mar 21-Mar 31: Tu,We,Fr,Sa 14:30-17:00; Apr 01-May 31: Mo-Su 14:30-17:00; Jun 01-Sep 30: Mo-Su 14:00-18:00; Oct 01-Dec 31: Tu,We,Fr,Sa 14:30-17:00; PH off; 2026-02-17 off; 2026-12-24 off; 2026-12-31 off

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Free for children under 12 accompanied by an adult; 20% discount for Terceira Blood Donors Association members; 15 EUR combo ticket available for Algar do Carvão and Gruta do Natal.

cavenaturevolcanicsinkholenational monumenteditor's choice

The Cosmonaut / cc-by-sa-4.0

Josep M. Gracia / cc-by-sa-4.0

The Cosmonaut / cc-by-sa-4.0

Alexandre Albore / cc-by-sa-4.0

This site is a unique volcanic chimney and vent formed by a strombolian volcano, reaching a depth of approximately 100 meters. Unlike traditional lava tubes, it consists of a vertical conduit that allows for descent into the interior of an ancient volcanic structure.

The interior is notable for its rare silica-based stalactites and stalagmites. At the bottom of the cavern lies a subterranean lagoon with crystal-clear water. The area also supports a diverse endemic ecosystem, contributing to its status as a protected regional natural monument since 1987.

The monument is open to the public, and guided tours are available for exploring the geological formations. It represents a significant geological site within the Azores archipelago.