Since 2010, producer and choreographer Alie Vidich has propelled dancers from the Strawberry Mansion Bridge in a performance art piece to advocate for Philadelphia’s watershed. Vidich will use the Schuylkill River as the backdrop for a performance called “Invisible River” on Saturday, July 12 and Sunday, July 13.

The show is used as a tool to promote the health of the river and educate constituents about how to create a more “sustainable, swimmable and drinkable river,” according to the Invisible River website. The shows are meant to take spectators on a journey that questions reality through music, nature and performance.

This year, the performance will feature newer elements, such as the opportunity for spectators to rent boats to watch the circus art inspired show for $25. From the shore of the river on Kelly Drive at 7:15 p.m. spectators can watch the aerial dance performance under the Strawberry Mansion Bridge for free. Dance choreographed by Vidich will take place on Peter’s Island and just north, past the tree installation on Kelly Drive, choreography by Olivia Jorgensen will be performed as well. Visit invisibleriver.org for directions, times and more details about the show.