The Rio Grande river. The Rio Grande, or Big River
new london
The natural boundary that separates New Jersy from Pennsylvania is the Delaware river
the equator...... i think
Tien Shan Mountains
Fall Line :)
The Ural Mountains.
A reef or low island.
The Pyrenees Mountains.
Rio Grande
A natural border, composed by the Rio Grande river.
The Rio Grande
The southwestern border of Texas is formed by the Rio Grande River, which separates Texas from the country of Mexico. This river stretches for about 1,254 miles, serving as a natural boundary between the two regions. It flows from the San Juan Mountains in Colorado to the Gulf of Mexico, playing a significant role in the geography and culture of the area.
The national boundary that separates Oregon and Washington is the Columbia River. This river flows westward to the Pacific Ocean and serves as the natural border between the two states for much of their length. The boundary is defined by the river's mid-channel, which means that the border shifts slightly with changes in the river's course.