Paseo de la Barrilla, Puerto del Carmen

What Ana Perić found here

The rocky shore under the promenade in the old town, right below Bar Playa. Walk along the wall and go down the steps at low tide. Not the raked sand of the resort beaches, which is probably why the glass is still there. Lots of lilac and aqua, a few multis and some grey. They fine you for taking sand or pebbles off a beach here, so stick to the glass.