```python
from typing import List

def tide_marks(levels: List[int]) -> List[int]:
    if len(levels) < 3:
        return []

    peaks = []
    for i in range(1, len(levels) - 1):
        current_level = levels[i]
        previous_level = levels[i - 1]
        next_level = levels[i + 1]

        if current_level > previous_level and current_level > next_level:
            peaks.append(i)

    return peaks
```