That depends on which country "down south" that you are referring to. Rivers are common to all countries.
The Clutha River also known as the Matau River is 322 km (200 miles) long.
Clutha 322 km
The Clutha or Matau river 322km long. An alternate source (wikipedia) gives 338 km, but this river has a well-defined length starting from the outlet of L Wanaka, and finishing at the coast.
the WAIKATO riverThe mighty Waikato.
Waikato 425 km North Island Clutha 322 km South Island
The second longest river in New Zealand is the Clutha in the South Island which is 322 km long. The Whanganui river (290 km, Nth Island) is third.
Waikato 425 km North Island Clutha 322 km South Island
New Zealand's 5 longest rivers are: Waikato River - 425 km, Clutha River - 322 km, Whanganui River - 290 km, Taieri River - 288 km, Rangitikei River - 241 km.
322 and 644 kilometers
322 Days
The island nation of Fiji comprises an archipelago of around 322 islands.
900 miles taking this route:Take I-180 SOUTH from Muncy to I-80 WEST to BELLEFONTE. EXIT.Take I-80 WEST across the river to U.S. 15 SOUTH to LEWISBURG at EXIT 210A.Take U.S. 15 SOUTH down to U.S. 22/322 EAST to HARRISBURG. EXIT.Take U.S. 22/322 EAST to I-81 SOUTH to CARLISLE, near Harrisburg.Take I-81 SOUTH all the way down to I-77 SOUTH to CHARLOTTE, NC at EXIT 81 in VIRGINIA.Take I-77 SOUTH to I-85 SOUTH to SPARTANBURG via I-485 SOUTH to bypass CHARLOTTE (EXIT 19B off I-77 in NORTH CAROLINA to get onto I-485 SOUTH to SPARTANBURG ; EXIT 10 B off I-485 to get onto I-85 SOUTH to SPARTANBURG).Take I-85 SOUTH down to I-185 SOUTH to COLUMBUS at EXIT 21 in GEORGIA. To bypass ATLANTA, take I-285 EAST BYPASS (EXIT 95A off I-85 in GEORGIA to get onto I-285 EAST BYPASS ; EXIT 61 off I-285 to get back onto I-85 SOUTH to COLUMBUS).Take I-185 SOUTH to Columbus.