1999 Ford Taurus SE Wagon coolant leak?

For a few weeks we have been having a mixture of coolant and oil on the ground. Today while doing the oil change and replacing the plug and gasket (which solved the leak) I notices whatever is right above the oil pan has a drop of antifreeze (diluted) coming off it about every thirty seconds. What part is this?

Might be a coolant hose or checkout the water pump