The Global River Runner is a vizualization simulating the path a raindrop would take, assuming it runs off into a stream and from then on to a terminating location, likely an inland water body or the ocean. A running list of interesting flow paths can be found here.
The Global River Runner is an open source Work In Progress, based on open data and open source software components, some of which themselves are in early or alpha development stages (all described in detail below). The vast majority of river paths calculated are based on topographic data collected and processed automatically, and may not reflect true river paths that may be affected by engineered features such as dams, canals, and conduits. Many names of rivers and inland water features such as lakes may be inaccurate as they are based on only on easily available datasets with global coverage. At times, the UI may exhibit slow or otherwise poor performance or encounter other errors. If you find issues regarding any of the above, please submit an issue through Github if you have an account, or fill out an issue survey form, to help us improve the application and underlying data!