Related Clues:

• Hearts' parts
• Some well-lit lobbies
• Skylit central courts
• Airy courts
• They're fed by venae cavae
• Open-air lobbies
• Features of some hotels
• Lobbies, often
• Open spaces in malls
• Central, open areas
• Courtyards with trees
• Sun spots?
• Spacious building areas
• Open spaces at malls
• Lobbies with glass ceilings