Let's see, we have pop-up beer gardens, pop-up restaurants, pop-up stores and now, a pop-up park. Located under the Holton Street Bridge, the "park" – created by a group of Milwaukee artists and activists – features five swings, a bench swing, two tire swings and a trapeze swing.

All of the seats are re-purposed tires with the website beintween.org spray painted on the bottom. An online video also contains this statement:

"This was social construct project: it invited other artists and those who support more spontaneous activity in our daily routines to come together last Friday night to do a guerrilla installation ... It is our hope that the installation will serve as not only an element of recreation, but as a point of reconsideration for these leftover spaces in our city."

The swings are very well-secured with thick ropes and chains to the bridge beams – they even affixed rubber around the beams so the chains wouldn't damage them.

I felt safe enough on the swings as a 120-pound adult that I'm bringing my kids back for some afternoon playtime before this gem of a park pops down.