Dreams featuring unfamiliar buildings often represent the mind's exploration of your inner self or emotions. Nightmares in such settings can indicate feelings of anxiety, confusion, or being overwhelmed by situations in your waking life. The various scenarios and endings may suggest that you are processing different fears or uncertainties.

Here are some insights to consider:

1. The Building: An unfamiliar building could symbolize new experiences or aspects of yourself that you are not yet fully aware of. It might represent personal growth, change, or challenges you are facing.
2. Nightmares: The recurring nightmares could point to unresolved issues or stressors in your life. Consider what emotions you feel during these dreams; fear, confusion, or frustration might reflect your current mental state.
3. Different Scenarios: The variability in scenarios might suggest that you are trying to find solutions or understand different perspectives regarding a particular issue you are dealing with.
4. Advice: Reflect on any current life situations that might be causing stress or anxiety. Journaling your feelings or talking to someone you trust might help you process these emotions. Additionally, establishing a calming bedtime routine could help reduce the frequency of nightmares.

Understanding these elements can lead to greater self-awareness and may help mitigate the distress caused by these dreams.