There is about 10 shipwrecks and some old abandoned houses all around the Hópsnes peninsula near Grindavík. This place can give you and good insight of how dangerous the waters are. There is an information board next to almost all the wrecks with the whole story.
How to find abandoned shipwrecks on Hópsnes peninsula:
Just south east of the Grindavík.
GPS coordinates of abandoned shipwrecks on Hópsnes peninsula Abandoned places : 63.827409, -22.404143 Take me there!