Come to San Antonio volcano visitor centre and see La Palma’s “Stonehenge” mark the autumn equinox on Sunday night at 7:30 pm.
Stonehenge is a bit of an overstatement, of course, but the modern astronomical marker at the visitor centre works the same way as Stonehenge. As the sun sets at the equinox, the shadow of one stone reaches another. (Different stones make shadows which reach the marker stone at the summer and winter solstice.)
Starting at 7:30 there will be a explanations by Antonio González and Miguel Martín.