Reference

Several buildings have been proposed or are under construction to exceed 300 meters in height. Some of these include:

1. X-Seed 4000: A conceptual structure envisioned to be one of the tallest ever, with a height of 4,000 meters Wikipedia.

2. 8 Shenton Way: A tower in Singapore that will offer offices, a hotel, and luxury residences, standing as a supertall skyscraper CNN.

3. Shanghai Tower: Currently under construction in Shanghai, it will stand as China's tallest building upon completion, exceeding 300 meters Chinadaily.

4. Mubarak Al-Kabeer Tower: Planned to reach a height of 1,001 meters and feature 234 floors in Kuwait Times Kuwait.

5. Jeddah Tower: Expected to exceed 1,000 meters in height, making it one of the tallest buildings in the world Construction Placements.

6. Abeno Harukas: Japan's first building to reach 300 meters in height, located in Osaka Nippon.

These buildings represent the ambition and innovation in architectural design and engineering, pushing the boundaries of what is possible in terms of height and functionality. Images of some of these buildings can be found in the search results, showcasing their impressive scale and design.