What Unique Geography Feature Creates a Natural Border Between Two Countries?

One of the most intriguing geographical features that serves as a natural border between two countries is the Rio Grande, which forms part of the boundary between the United States and Mexico. This river, which stretches approximately 1,896 miles, not only defines the political border but also plays a crucial role in the ecological dynamics of the region. The Rio Grande's watershed is home to diverse ecosystems, including deserts and forests, and supports a variety of wildlife. Interestingly, the river's flow has changed over the years due to climate variations, water management practices, and urban development, leading to disputes over water rights between the two countries. As a result, the Rio Grande embodies the intersection of geography, ecology, and international relations, illustrating how natural features can influence human borders and interactions.