Downtown St. Petersburg seems to have grown a forest of construction cranes in the past few weeks. Several large projects are rising on what were once vacant lots or parking lots. All of the projects, which are in various stages of building, will be rentals and are scheduled for completion later this year or in 2014. Photographer Chris Zuppa took these aerial photos on June 29 to show progress on each. Click through them to find more information about each project.