Beaver Valley is an unincorporated community

Unincorporated area

In law, an unincorporated area is a region of land that is not a part of any municipality.To "incorporate" in this context means to form a municipal corporation, a city, town, or village with its own government. An unincorporated community is usually not subject to or taxed by a municipal government...

 in New Castle County

New Castle County, Delaware

New Castle County is the northernmost of the three counties of the U.S. state of Delaware. As of 2010 its population was 538,479, an increase of 7.6% over the previous decade. The county seat is Wilmington. The center of population of Delaware is located in New Castle County, in the town of...

, Delaware

Delaware

Delaware is a U.S. state located on the Atlantic Coast in the Mid-Atlantic region of the United States. It is bordered to the south and west by Maryland, and to the north by Pennsylvania...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It is about 7 miles north of Wilmington

Wilmington, Delaware

Wilmington is the largest city in the state of Delaware, United States, and is located at the confluence of the Christina River and Brandywine Creek, near where the Christina flows into the Delaware River. It is the county seat of New Castle County and one of the major cities in the Delaware Valley...

, almost exactly on the Pennsylvania-Delaware border, where Beaver Valley Road meets Beaver Dam Road. Both roads cross a small tributary of Brandywine Creek nearby. A small cave, known as the "Beaver Valley Cave," "Beaver Valley Rock Shelter" or "Delaware's Only Cave" is nearby. Though it is less than 100 feet long, the cave is of geological, historical, and archeological interest. It is also on private property, clearly posted "No Trespassing."