A roof can be a platform for a cupola that illuminates the night sky. Whether cupola or chimneys or something else, these elements on the roof continue all that vertical movement, pushing our eye ever upward. Even the ubiquitous and often undersized weather vane can achieve the same effect.
Widow's walks require a certain level of upkeep due to the fact that they're constantly exposed to the elements. When this Greek revival residence was renovated, the goal was to revive the original bones and elements, with a focus on the widow's walk.