The West End has long been defined by the fact that it was not any of the adjacent, more prominent neighborhoods: Dupont Circle, Foggy Bottom, and Georgetown. However, with the development of the Washington Metro rail system, the West End is now most often spoken of as being part of the Foggy Bottom neighborhood. Its prominent landmarks include a Ritz Carlton hotel and residences, a few other upscale hotels, several large office buildings, and the West End branch of the D.C. Public Library.