A military bunker or fortified structure is located near the specified coordinates (34.6384952, -77.312104) in the United States, in a coastal region of North Carolina with a significant military history. The area is near known military installations such as Marine Corps Base Camp Lejeune and the former Camp Davis, which were active during World War II for artillery and anti-aircraft training, and later during the Cold War.
Without specific, confirmed identification from the provided search results, the exact purpose, construction date, and current status of this particular structure cannot be determined. The site may be a remnant of 20th-century coastal defense, a Cold War-era facility, or part of training grounds, but further localized historical or archaeological research is required for verification.