Mimaropa (Southwesten Tagalog Region)
Mimaropa, previously known as the Southwestern Tagalog Region or Region IV-B is one of two regions in the country having no land border with another region (the other being Eastern Visayas). It is one of the busiest regions in terms of tourism. The name is an acronym combination of its member provinces: MIndoro (Occidental and Oriental Mindoro), MArinduque, ROmblon and PAlawan.