The handshake as a form of greeting in the united states is an example of a:

The handshake as a form of greeting in the United States is an example of a Cultural Symbol. They practice this to express explicit philosophies and communal structures and signify different features of a specific culture. They convey meanings that depend upon a person’s cultural contextual.

idk if you found them already or not but you probably did but the one closer to sea level is raleigh.