Tunnel of love?

It ought to be easy ought to be simple enough,
Man meets woman and they fall in love,
But the house is haunted and the ride gets rough
And you've got to learn to live with what you can't rise above,
If you want to ride on down in through this tunnel of love
- Bruce Springsteen

Not sure if this is a "tunnel of love" or perhaps a "hole in the wall", I must have passed it fifty times in the last year but only saw it today for the first time! Didn't want to walk through it in case I ended up in Narnia or the Land of Oz or something. One day I might to back and venture through.