This stamp and souvenir sheet were issued by the Azores on 27 Oct 2007 commemorating the 50th anniversary of the eruption of the Capelinhos volcano. Capelinhos lighthouse is shown at the lower right corner of the stamp. The lighthouse is reportedly the only structure that survived the year-long eruption that began in 1957.
Capelinhos L/H | 27 Sep 2007 (50th anniversary of the Capelinhos eruption)
See more lighthouse stamps from the Azores here