Four figures representing them appear in a Bernini fountain, and Johann Strauss, Jr.'s most famous waltz is titled for one of these places.
In Bicycle Thieves, Antonio is relieved that his son is not the child he sees nearly die in a Roman one of these places. A dove representing the Pamphili and an obelisk appear in a statue depicting these things. This type of place names the second movement of Bedrich Smetana's (*) Ma Vlast. Thomas Cole depicted a thunderstorm over one of these in The Oxbow, and himself belonged to a school named for one. Four figures representing them appear in a Bernini fountain, and Johann Strauss, Jr.'s most famous waltz is titled for one of these places. For 10 points, name these bodies of water such as the "Beautiful Blue Danube."
In Bicycle Thieves, Antonio is relieved that his son is not the child he sees nearly die in a Roman one of these places.
rivers (accept synonyms; anti-prompt [ask for less specific] on specific rivers)