What things have many holes?

Answer 1

Things that have many holes include:

1. Space - Black Holes
2. Swiss Cheese
3. mesh
4. an old worn out blanket
5. chicken wire
6. a shooting range's paper targets
7. underground mines and caves
   
8. a grate over a heating vent
9. a grate over a fan
10. someone's lies - "There were too many holes in his story."

Answer 2

A Golf course has many holes. Additional things with holes include Swiss Cheese, mesh and honeycombs.