2000 Bravada leaking antifreeze

Today while driving I smelled antifreeze, so I checked for leaks as soon as I got home. I can't see where the actual leak is at; however, using a flashlight it appears to be at the bottom of the radiator. What is located at the bottom of the radiator that might be leaking? It has leaked on the oil filter and is dripping out from that area. There is a long metal guard that runs under the radiator and that has leaked antifreeze at both ends (I can't see the middle). My coolant overflow is dry and I can't get the radiator cap off. Any ideas on what my first step toward diagnosing this problem should be?

Check your radiator hoses. Search the area just under where the top radiator hose connects to the radiator.