You're looking at ongoing interaction between two or more galaxies, dark lanes of dust, and pink glowing gas associated with heavy star formation.
Data from the following proposals were used to create this image:
Reddish-Magenta screen: WFC3/UVIS F665N
Red: ACS/WFC F814W
Green: WFC3/UVIS F555W
Blue: ACS/WFC F435W+WFC3/UVIS F438W
North is up.