In described examples, there are systems and methods for deployment in proximity to an abandoned well. The systems and methods may help monitor conditions at an abandoned well and/or help communication with downhole communicate devices. In some examples, there is described a communication system that is configured to be deployed in proximity to an abandoned well having a metallic well structure severed below a ground region. The system may include a plurality of receivers configured to be deployed at the ground region in proximity to the abandoned well, and configured to receive data signals from the metallic well structure of the abandoned well via the ground region. The system may comprise a processing unit, in communication with the receivers, and configured to receive and process data signals from the receivers.