Sign on road with stratified volcanic rocks in the background, Parque Nacional del Teide, Tenerife, Canary Islands, Spain, Atlantic, Europe

atlantic attention bend canary islands change color image communication crumbling curved danger day descending descent europe falling guidance hazard horizontal incline journey landscape nobody obstruction outdoors parque nacional photography precaution risk road road sign rock sign slope sloping spain steep stratified volcanic rocks teide tenerife transportation travel travel destinations valley volcanic warning caution cautioning color colour communicating counseling daytime descend eu eu european european union jeopardy mediterranean outside sinage south west europe southern european spanish stone street tour transporting traveling travelling trip warn