Not my photo but I was asked by the photographer if I knew what it was - I don’t! It is a line of 16 vertical antennas at Pointe de Brezellec, Cléden-Cap-Sizun in Brittany, France. This is near Brest which is a big naval base so might be part of a trial/experiment. I am guessing they are VHF antenna, possibly marine band, and might be for range/direction finding.
It looks like a big phased array of short verticals, for receiving on HF. I imagine each one will have an identical broadband amplifier at the elevated feedpoint, carefully selected feeder lengths all connected to a complex phasing network to make it steerable.
Its the linear equidistant array of 16 receive antenna for a HF radar, centred on 12.4Mhz. It studies the ocean surface. There will be a transmitter site in the same area.
Rather than active receive antennas, they are probably just 12.4Mhz verticals with elevated radials.