Creating metal sculptures that are both monumental and interactive requires a blend of artistic vision, technical skill, and public engagement strategies. Here are the best ways to achieve this:

1. Choose Durable Materials: Opt for weather-resistant metals like stainless steel or bronze to ensure longevity, especially for large-scale outdoor installations.

2. Incorporate Interactive Elements: Design sculptures with movable parts, touch-sensitive surfaces, or augmented reality features to invite audience participation.

3. Focus on Scale and Impact: Monumental sculptures should command attention. Use bold shapes and dynamic forms to create visual dominance in public spaces.

4. Leverage Structural Engineering: Collaborate with engineers to ensure stability and safety, particularly for interactive components that may experience frequent use.

5. Engage the Community: Involve local communities in the creative process to foster a sense of ownership and ensure the sculpture resonates with its audience.

By combining these techniques, artists can create metal sculptures that are not only visually striking but also deeply engaging for the public.