The road is partially washed out and getting claimed by vegetation.- Photon (Wikipedia)
A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) ’light’) is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force. Photons are massless particles that always move at the speed of light when in vacuum. The photon belongs to the class of boson particles.