There are numerous unfinished buildings that remain partially constructed in countries around the world, some of which can be used in their incomplete state, while others remain as mere shells. An example of the latter is the Ryugyong Hotel in North Korea. If finished, it would become the tallest hotel in the world and the seventh largest building but is uninhabitable and will not be completed due to the cost and the poor structural integrity. Some projects are intentionally left with an unfinished appearance, particularly the follies of the late 16th to 18th century.