To recover old photos from WhatsApp, you can try accessing your phone's WhatsApp media folder, which is located in the phone's internal storage or external SD card. Navigate to the folder named WhatsApp and then to Media, where you'll find all the images, videos, and audio files sent and received through WhatsApp. If the photos are not there, you can try restoring them from a WhatsApp backup, which can be done through WhatsApp's backup and restore feature.