4 sides to a post.................like 4 directions......................................like East............the river ........East river.........next to NYC............to EAST Potomac park..........Wash Dc.........named so b/c of the river that runs by it..........

East River - Wikipedia

https://en.wikipedia.org › wiki › East_River

The East River is a salt water tidal estuary in New York City. The waterway, which is actually not ... lies under the river bed. Why the river turns to the east as it approaches the three lower Manhattan bridges is currently geologically unknown.

Source‎: ‎Long Island Sound

Mouth‎: ‎Upper New York Bay

State‎: ‎New York

Length‎: ‎16 mi (26 km)

‎East River Park · ‎East River Tunnels · ‎Lists of crossings of the East ...