More interactive map plugins and the Pro versions: wp-maps.com
Optional province abbreviations on the map.
A link for every province, optionally in a new tab.
Shortcode: [bg_map]
No external requests.
Bulgaria Map Pro adds unlimited maps, colors with transparency, 2,100+ Font Awesome icons, info popups, weather, election results and 9 demo maps. See the Go Pro page in the plugin menu.
Credits
Map outlines: simplified from Natural Earth (naturalearthdata.com, public domain).