Stares
• Goggles
• Is visibly curious
• Joins the rubberneckers
• Ogles
• Rubbernecks
• Stares (at)
• Stares conspicuously
• Stares densely
• Stares for a long time
• Stares open-mouthed
• Stares stupidly
• Stares, maybe open-mouthed