Map oddities

Corridors, enclaves and tripoints: the shapes that make you look twice.

Lake ConstanceGermany, Switzerland and Austria share Lake Constance, but across most of it no treaty says where one country ends and the next begins. Switzerland sees a line down the middle, Austria sees water they hold together, and all three prefer to leave it that way.
Madha and NahwaA piece of Oman surrounded by the UAE, with a piece of the UAE inside it. When the villages here were asked which ruler they followed, Madha chose the sultan of Oman and Nahwa stayed with Sharjah.
The Wakhan CorridorA strip of Afghanistan about 350 km long and in places only 13 km wide, reaching east to touch China. Britain and Russia drew it in the 1890s so that their empires in Asia would not share a border.