The only limits an outdoor course has is the amount of land you have.  Outdoor courses generally can be either Adventure Style or Landscaped Style.  

Adventure Golf is all about "THE SHOW" and the theme drives the look of the course (this life-size cartooms, ships, dinosaurs). There is no limit to the creativity that can take shape in an Adventure Mini Golf Course.

Pirate themed mini golf course

Landscape courses, while not quite as over the top, are interactive, fun and will work with limited budgets or smaller markets & venues.

Mini golf course hole with waterfall and dog leg to the left