Catharsis on the Mall has been bringing a little slice of Burning Man to D.C. since 2015. This year’s theme was “Our Mothership” (which is a fun way to say Mother Earth), but art installations ranged from a soap shower called “Primordial Soap” (which immediately brought us back to the golden days of foam parties at Ocean City, Maryland’s only 21 under club, H20) to giant colorful dinosaurs. Between the art and the fire and the dancing, it might be the wildest party in the city. The best part is that unlike Burning Man, it is 100% free. Soak up the soap and the dance parties and the photos below.