(4) Facing the sea and having no land boundary with other countries;

Peninsula countries:

It is formed by geological structural fault depression, facing the sea on three sides and having land borders with other countries;

Coastal countries:

The reason for the formation of the country is the geological movement outside the fault depression. In addition to the land boundary, there is also the maritime boundary.

South Africa is not a peninsula because of geological structure fault depression;

Canada is a coastal country;

The Caspian Sea is not a sea, but a lake, so the countries around the Caspian Sea are not coastal countries.