Marian R. Byrnes Park, IL • May 2025

This place is a unique kind of urban restoration. Van Vlissingen Park has been owned by the Chicago Park District since 2011. When we first started visiting, it was an overgrown, impenetrable, Phragmites-filled mess, like many public lands around Chicago in the 80s through early 2000s.

And the restoration isn’t back to some pre-colonial time; this is no remnant habitat here. It’s a spontaneous ecosystem that moved in on a bed of slag and construction waste. Some of the waste continues to erupt from layers of soil; bricks and building materials form vignettes highlighting the ever present human input into these urban ecosystems.

Now that it’s Marian R. Byrnes Natural Area, it’s a beautiful slag prairie and wetland, with a luxurious woodland path.

Alisma inflorescences from last year, and new vegetative growth

an honor for another explorer of underappreciated ecosystems to make his mark here!
with the water level down across the site, you can see balled up Nostoc, slowly dehydrating

Powderhorn, Chicago IL • April 2025

Powderhorn encompasses a vast tract of land, owned and managed by the Forest Preserve District of Cook County, on the far southeast side of Chicago. It’s a stocked lake with fishers all year round, an award-winning remnant dune and swale habitat,

a to-be-acquired industrial lot with rail tankers, a railroad track lined with Phragmites, and disused land in a residential district made into an urban sponge that captures rainwater and drains it in to the lake. Altogether, it makes a really nice urban greenspace

that works with the land and hydrology and habitats, and enhances what they already are (minus some invasive species and plus some light mowing). Check out this terrific Storymap about the most recent restoration project!

We saw lots of evidence of beavers!

and other wildlife — like this osprey on a nest on a human-constructed osprey tower!

Thornton Quarries, IL • September 2024

we drove all the way along thornton-lansing road, ignoring our usual stop at the fairy ponds, and drooling at the restored forest preserve to the south;

then turned south, wiggling beside, and then across, thorn creek. (I was focused on driving so these are all snips from google street view:)

“and where,” I mused, “are the quarries?” So we drove further west and my god they are huge. hidden, sloppily, by recruits from the local seed pool, or so completely by earthen berms, that it’s not clear exactly where they are.

then we noticed a lookout on the east side of this southern quarry. no one else was around.

we were unable to actually access the lookout, but it’s clear it wasn’t too long ago that people were invited into this space by manicured junipers and fossils. what a view it must have been!

unfortunately there was not an easy way to bypass the fence, so we walked tamely back east, along the mowed grass and gravel, both dusty. it’s been weeks without rain. the young trees – ash, tree of heaven, buckthorn – sadly hung their leaves, in heavy yellows and reds.

It’s not a place where I’d like to fall in, but nothing is more inviting than restricted access…

Burnham Prairie, IL • April 2024

We came up through the south end of Burnham Prairie, over several sets of railroad tracks. There was no parking lot; it just seemed like a close spot based on Google Maps.

We found a recent burn by Com Ed,

and skirted the wetlands of the Illinois State Nature Preserve.

We turned back and drove up to the north end of Burnham Prairie, well-hidden in the furthest reaches of residential Burnham, abutting the Grand Calumet River.

As we approached the slag prairie I realized I’d forgotten how much like Mars this slag is: everything is very stunted (very clear in cottonwoods); spotted knapweed is a champ and brings all the pollinators to the yard; there are a few Liatris, lots of whorled milkweed, some sumac; mosses making the barrens less barren.

Check out another visit to the same site a few years ago: Burnham Prairie, IL • March 2016

Indian Ridge Marsh, IL • March 2024

A recent controlled burn here has left a patchwork of new growth of sedges, rushes, and grasses, which will be punctuated with fireworks of colorful flowers later in the year.

other fun finds included:
a well supported bench on high – probably useful for waterfowl hunting.

a spontaneous terrarium.

nice views.

Acme Steel Coke Plant, IL • November 2023

Coking is part of the steel-making process. So the “steel industry waste” with spontaneous vegetation at this Acme Steel site is not slag, like at most other sites on the Slag Map, but what often looks like charcoal briquets made of fly ash.

We found a snake friend taking advantage of the raking sunlight.

Check out another visit to the same site a few years ago: Indian Ridge Marsh and beyond, IL • November 2020