Texas' only natural lake is Caddo Lake, shared with this state to the east
[DOC] [TLE] Caddo Lake - Wikipedia [PAR] Caddo Lake (French: Lac Caddo) is a 25,400 acres (10,300 ha) lake and bayou (
wetland) on ... Caddo is one of Texas's few non-oxbow natural lakes and is the 
2nd largest in the ... of Louisiana and Texas by treaty (Texas is the only State in 
the United States to have joined by treaty instead of annexation) in the 19th 
century.