Check out Fort Frederik St Croix USVI 3D model on CGTrader for $10.5. High-quality mesh by stanley-sneed.
STL (Stereolithography, filesize: 234 KB), OBJ (OBJ, filesize: 207 KB), 3DS (3D Studio, filesize: 152 KB), FBX (Autodesk FBX, filesize: 344 KB), IGE (IGES, filesize: 298 Bytes), MAX (Autodesk 3ds Max, filesize: 306 KB), SKP (Sketchup, filesize: 4.21 MB), OTHER (Other, filesize: 135 KB)