Kickstarter doesn't have a browse area for projects that didn't meet their goal. However, unsuccessfully funded projects are accessible through Kickstarter's search engine and the profile pages of the project's creator and backers. When users click on a creator's profile they can see all of the creator's past projects — successfully and unsuccessfully funded.
In terms of external search engines (Google, Bing, etc.), Kickstarter de-indexes projects whose funding was unsuccessful. This means that unsuccessfully funded projects shouldn't show up in those search results.