What is the Fourth River?
In Pittsburgh mythology, many people will swear there is an underground river below the Allegheny, Monongahela, and Ohio Rivers. This underground river is said to be the source of water for the fountain at Point State Park. Of course, it's really a sand and gravel aquifer, deposited as outwash at the end of the last ice age.
Fourth River is also the name for one of Pittsburgh’s finest up and coming grassroots bands. Appropriately...