Tiber Creek, Washington, D. C.

Founded in 1790, the city of Washington was built on largely undeveloped land carved out of the state of Maryland as the nation’s capital district. Its main river is the Potomac, a mighty stream that forms the Virginia-Maryland boundary. The city’s second river is the Anacostia, which flows on the city’s eastern side. For hiking, there is also Rock Creek, which collects water from numerous tributaries in Maryland and within the city. Perhaps the most famous of Washington’s hidden streams is Tiber Creek, with its Roman name.

It passed by another Roman-inspired location: Capitol Hill, named by none other than Thomas Jefferson.