Arbor vitae are present in the cerebellum.

Explanation

### Step-by-Step Solution:

1. **Understanding Arbor Vitae**:
- Arbor vitae, which translates to "tree of life," refers to the white matter located within the cerebellum. Its name comes from its tree-like branching structure.

2. **Location**:
- Arbor vitae is specifically found in the cerebellum, which is a part of the brain responsible for coordination and balance.

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