Two indispensable festivals that share interests and dynamics. And, accidentally, both are celebrated in two islands. Keroxen is one of the most interesting creative and divulging event in the Canary Islands; Tremor is a surprising proposal in the middle of the nature, wild and omnipresent, in the Azores Islands, an idyllic enclave in the middle of the Atlantic. The environment and the natural landscape are essential to understand those proposals that, like Eufònic festival.