St. John's Bastion is a large obtuse-angled bastion with a reconstructed echaugette at its salient angle. It now forms part of Hastings Gardens.
St. John's Cavalier is a pentagonal cavalier overlooking St. John's Bastion. It is now the embassy of the SMOM to Malta.
St. John's Curtain is the curtain wall linking St. Michael's and St. John's Bastions. It now forms part of Hastings Gardens.