Any website, as a city
One building for every page in the site's sitemap.
Tower updated this year
House 1 to 3 years old
Grey shed 3+ years untouched
Block no date given
The dates come from the site's own sitemap (its <lastmod> lines), the map search engines read. Each street is one section of the site. Big sites are read in part: up to 10 of their sitemaps. Nothing you type is stored.