rivers.md

Example river data from Wikipedia

Rivers [
  [
    [Robinson River]
    Location [
      Country [Australia]
    ]
    Physical characteristics [
      Source [
        elevation [152 metres (499 ft)]
      ]
      Mouth [
        location [Stokes Bay]
        elevation [sea level]
      ]
      Length [107 kilometres (66 mi)]
      Basin size [3,329 square kilometres (1,285 sq mi)]
    ]
  ]
  [
    [Wooramel]
    Location [
      Country [Australia]
      State [Western Australia]
      Region [Gascoyne]
    ]
    Physical characteristics [
      Source [
        [McLeod Pyramid]
        coordinates [25°47′12″S 116°40′23″E]
        elevation [357 m (1,171 ft)]
      ]
      Mouth	[
        [Shark Bay]
        location [near Herald Loop]
        coordinates [25°52′59″S 114°13′57″E]
        elevation [0 m (0 ft)]
      ]
      Length [363 km (226 mi)]
      Basin size [40,500 km2 (15,600 sq mi)]
      Discharge [
        location [mouth]
      ]
    ]
  ]
]