X-SEED 4000

# The X-Seed 4000 is the tallest building ever fully envisioned, meaning that the designs for construction have been completed. The idea was initially created and developed by Peter Neville. Its proposed 4 km (2.485 miles) height, 6 km (3.728 miles) wide sea-base, and 800 floor capacity could accommodate five hundred thousand to one million inhabitants.

# It was designed for Tokyo, Japan by the Taisei Corporation in 1995 as a futuristic environment combining ultra-modern living and interaction with nature. the proposed area is situated on The Pacific Ring of Fire, which is the most active volcano range in the world so X-Seed 4000 would be subject to tsunamis and earthquakes. The Shimizu Mega-City Pyramid (also planned for Tokyo, Japan) faces the same problems.

The X-Seed 4000 is projected to be twice the height of the Shimizu Mega-City Pyramid at 2004 m.