Bob Cassilly worked on Cementland for more than a decade. An abandoned cement factory at the far northern reaches of St. Louis City along the Mississippi River was to become something of an extreme City Museum on steroids, which itself is an otherworldly, outsized playground. It was an ambitious vision that was further along than many might have realized when its visionary was found dead at the site September 26, 2011.

Cassilly died without a will and his estate spent the past five years in probate. Now resolved, word is that work will resume at Cementland soon. His wife has now also gone public with her concerns that Cassilly did not die in a bulldozer accident as widely reported, but rather was assaulted and killed.

Signs at the property, and notices on the website state that repeatedly that the site is not open to the public and that trespassing will not be tolerated. You should not attempt to explore Cementland on your own. Below are 38 images detailing the site. To those unfamiliar with City Museum, Cementland may appear another decade from completion, but to others the site could open tomorrow.

The top image is from the Cementland website. All images below are from Flickr user Pasa47.

Looking for even more? Photographer Dan Wampler was recently granted access to photograph Cementland and here’s what he found.