Two important elements in any architectural projects is the way in which the space is able to function, and the impact of the space, or the impression that it leaves on the viewer who is using or moving through it. And in the best most thought out projects these kinds of elements are very fluidly connected to each other in a way in which the both enhance the other one.
The Copacabana Promenade in Rio, the Hoenheim Nord Terminal, and the Touch of Evil Project are all examples of projects that in some way challenge the connection of impression of a project and the functionality of the space. In many contemporary projects build today the function is put as the main focus that drives the project, and this is a logical way to develop ideas, but these three particular projects are unique examples that see the impression that the space can make on the viewer as the driving force behind the concept and execution of all the elements of the project.
The Copacabana promenade in Rio, by Robert Burley Marx, is a geometrical pattern that defines a space of a walkway through a park in Rio, the space is set up with a pattern that is based on the logical organization of simple geometry, yet is still completely curvilinear and seeming to have a natural quality that ungulates as you move through it, and although it is not a significant piece of architecture as far as function, it completely changes how the project is experienced, but it is part of a larger park project which has some functional elements tied with it, so it is not a project void of function.
The Hoenheim Nord Terminal and Car Park by Zaha Hadid is functionally a very simple project defined by the unique patterns and layout of the space effect the perception and impression of the project, creating different effects not just with the paint of façade of the project but also by the organization shape and layout of the functional and structural elements in a unique way which leaves a strong impression on the space and changes how it feels. So of all there of the examples this is the project that has the most functional architectural elements incorporated into the design, yet it is still a project that is commonly done in the most simple and cheapest way, without considering the experiential quality of the space.
An Interesting example of a purely aesthetic change to a space, Is the Touch of Evil Project by NIO Architects, existing already as a freeway that was completely functional yet, needed some kind of visual interest to make the space a more meaningful and interesting experience. So this could almost be seen as a renovation project to the existing structure, which is unique because it is not improving the functionality of the structure in any way, but only seeks to change the experience. So in this way this has to considered the least architectural of the projects, it almost serves the same function as an art project added to any simple or functional thing in order to change the experience of using it.