States of Austria arable terrain. The other five states, in contrast, are located in the Alps and thus are comparatively unsuitable for agriculture. Their terrain is also relatively unfavourable to heavy industry and long-distance trade. Accordingly, the population of what now is the Republic of Austria has been concentrated in the former four states since prehistoric times. Austria's most densely populated state is the city-state of Vienna, the heart of what is Austria's only metropolitan area. Lower Austria ranks only fourth with regard to population density even though it contains Vienna's suburbs; this is due to large areas of land being predominantly agricultural.
Unincorporated territories of the United States Unincorporated territories of the United States Under United States law, an unincorporated territory is an area controlled by the United States government which is not part of (i.e., "incorporated" in) the United States. In unincorporated territories, the U.S. Constitution applies only partially. In the absence of an organic law, a territory is classified as unorganized. In unincorporated territories, "fundamental rights apply as a matter of law, but other constitutional rights are not available". Selected constitutional provisions apply depending on congressional acts and judicial rulings according to U.S. constitutional practice, local tradition, and law. There are currently 13 unincorporated territories, comprising