- Fort Columbia State Park is a public recreation area and historic preserve at the site of the former Fort Columbia, located on Chinook Point at the mouth of the Columbia River in Chinook, Washington. The 618-acre (250 ha) state park features twelve historic wood-frame buildings from the fort complex as well as an interpretive center and hiking trails. The park’s grounds are located over a tunneled section of U.S. Route 101.
- Archimedean solid (Wikipedia)
In geometry, an Archimedean solid is one of 13 convex polyhedra whose faces are regular polygons and whose vertices are all symmetric to each other. They were first enumerated by Archimedes. They belong to the class of convex uniform polyhedra, the convex polyhedra with regular faces and symmetric vertices, which is divided into the Archimedean solids, the five Platonic solids (each with only one type of polygon face), and the two infinite families of prisms and antiprisms. The pseudorhombicuboctahedron is an extra polyhedron with regular faces and congruent vertices, but it is not generally counted as an Archimedean solid because it is not vertex-transitive. An even larger class than the convex uniform polyhedra is the Johnson solids, whose regular polygonal faces do not need to meet in identical vertices.