Tohoku region, Honshu with road, rail and prefecture boundaries.
Japan - Tokushima Prefecture with gun boundaries.
The combined border area of Myanmar, Thailand and Laos on the Upper Mekong River showing border towns and the central location of the Golden Triangle in the Southeast Asian border mountains.
The Tai states of the Upper Mekong.
The Windward Islands in the Caribbean / West Indies which form the southern part of the Caribean Lesser Antilles.