What is the modernest cuty in the world ?

Defining the "most modern" city is subjective and can vary based on different criteria. However, there are several cities known for their advanced infrastructure, technology, and urban development. Here are a few cities often considered among the most modern:

1. Tokyo, Japan: Tokyo is renowned for its cutting-edge technology, efficient transportation systems, futuristic architecture, and advanced urban planning. It has a highly developed infrastructure, smart city initiatives, and a vibrant urban environment.
2. Singapore: Singapore is recognized for its exceptional urban planning, sustainable development, and high-tech infrastructure. It embraces smart city solutions, clean energy initiatives, and digital innovations to enhance the quality of life for its residents.
3. Dubai, United Arab Emirates: Dubai is renowned for its rapid transformation and iconic skyline. It is known for its ambitious architectural projects, including the Burj Khalifa, Palm Jumeirah, and futuristic developments such as Dubai Marina. The city combines modernity with luxury, attracting tourists and businesses from around the world.
4. Seoul, South Korea: Seoul is often considered a hub of technological innovation and digital connectivity. It boasts an extensive public transportation system, smart city initiatives, and a tech-savvy population. Seoul has also invested in sustainable urban development and eco-friendly infrastructure.
5. Helsinki, Finland: Helsinki is celebrated for its innovative approaches to urban planning and sustainability. It is a leader in clean technology, energy efficiency, and smart city solutions. Helsinki also emphasizes the integration of nature into the urban environment, creating a harmonious blend of modernity and natural beauty.

It's important to note that the concept of a "modern" city is dynamic, and other cities around the world are also making significant strides in terms of urban development, sustainability, and technological advancements.