After the oil crash of the 1980s, it took two decades for new high-rise projects to begin appearing again in downtown Denver — and now that mini building boom is going bust. Given the current economic climes, the few buildings nearing completion could be the last of their type for quite a while. The most promising of the group is 1800 Larimer, a project of Westfield Development. As planned by the Denver architectural firm of RNL Design, the building will rise 22 stories and be topped by a penthouse with a striking butterfly roof. The exterior walls will be distinctive, too, covered in a Mondrian-esque pattern with deep-blue glass panels. But this building isn't just about looking good; it's also been designed to be as "green" as possible, with the plans already LEED-certified. This high-rise should be a stunning addition to the downtown landscape, and since over 70 percent of it has been pre-leased, it's likely to actually get finished.