Amphitheater 
To dream of an amphitheater suggests that you are currently being closely watched or scrutinized. Rather than letting this overwhelm you, turn it around and use it to your advantage.
Dreaming you are in an amphitheater symbolizes a position of trust. Try not to let those close to you feel down.
Weightlifting
To be weightlifting in a dream symbolizes discipline and training. You are working to increase your worth, your strength, and your confidence.
Revolving Door
*See Door.
Slaughterhouse
To dream that you are in a slaughterhouse implies that you may need to concede a quality or attribute so that you can continue on with your life. You may need to cut off a part of yourself in order to move ahead.
Parking Structure
To be lost in a parking structure in a dream implies that you are struggling to make progress toward a goal. You may feel that you are going around in circles and the situation never changes.
To be searching for your car in a parking structure in a dream indicates that you may reach your goal or a setback of reaching your goal which depends on the outcome of your search.