Related Clues:

• Relents
• Gives up the fight
• Stalactite sites
• Spelunking sites
• Gives in
• Places to spelunk
• Cries uncle
• Spelunker's spots
• Lairs for bears
• Locales for some paintings
• Dark passages
• Collapses
• Where troglodytes feel at home
• Underground chambers
• Spelunking venues