At one point there is a slip road on and off the main carriageway in a tunnel. That's not a thing I see every day.
Our accommodation was about 30-40 minutes drive from the airport along this road and then up a couple of mountain roads. You had to have your dipped headlights on for the tunnels, but to be honest the tunnels were so frequent it wasn't actually worth turning them off until you left the motorway.
This picture was taken from the Botanical Gardens outside Funchal.