Andrew Clem’s website is the sort of personal domain that makes modern profile pages look malnourished. It contains years of writing, birding records, travel material and politics, but the spectacular part is a hand-built atlas of baseball stadiums going back more than a century.
The baseball section describes itself, reasonably enough, as “baseball stadium heaven.” Its core is a large set of stadium pages covering current and former Major League Baseball parks back to 1909, plus miscellaneous and non-MLB parks Clem has visited or researched.
Stadium Diagrams as a Long-Term Obsession
These are not copied seating charts. Clem draws the parks from a consistent top-down perspective and keeps refining them as better information becomes available.
The diagrams document field shape, grandstand geometry, decks, dimensions and historical changes. On some pages a mouse rollover can switch between different configurations of the same stadium. His Mile High Stadium page, for example, can show football and baseball layouts from different eras. Older stadium pages include chronology notes showing when their diagrams were revised.
That revision history is part of the charm. This is not a database dumped once and forgotten. It is somebody returning to the same research project for years, correcting the shape of an upper deck because apparently peace was never an option.
Clem also standardized the home-plate position in newer diagrams so parks can be compared side by side or overlaid. That is the kind of small design decision that turns a hobby site into a genuinely useful research tool.
Then There Are the Birds
Baseball is only one branch. The site also contains a long-running wild-bird diary with photographs, life lists, annual arrival dates and species indexes. Clem’s bird-photo pages let visitors browse photographs by species, sex, age and other variations.
There are also travel photographs, personal archives and years of blog material. The site’s navigation still reflects the older idea that one domain could simply be a person’s entire information universe rather than one narrowly branded project.
The candidate page CacheRat found sits inside the site’s old archive structure, but following it outward reveals the larger point: the archive never became a dead end. The domain is still being maintained, and some baseball pages show updates and visits from 2026.
For webmasters, there is a lesson here. A specialized reference does not need a huge backend or a corporate editorial staff to become valuable. It needs consistent structure, durable URLs, accumulated expertise and an owner stubborn enough to keep fixing things.
Explore Clem’s baseball stadium diagrams
The result is exactly the kind of thing search engines are supposed to help us find: one person’s extremely specific knowledge, organized well enough that strangers can use it.