Wonderful cover.
These 3 stamps with face value of 0, 25 euros each are part of the series "WELTERBE" - Word Heritage - issued on 2007.
It is a tribute to 3 places in South America, that the story enshrined, including:
-- Machu Picchu (Peru)
-- Rada Nui - the Pascua Island (Chile)
-- Cueva de Las Manos (Argentina)
Thank you very much, Holger!
