Most expensive single object on Earth

- Who
- Itaipu hydroelectric dam
- What
- 27000000000 US dollar(s)
- When
- 01 January 0001
The Itaipu hydroelectric dam on the Paraná River between Brazil and Paraguay cost $27 billion to build in 1984 (now $35.93 billion), making it the single most expensive object on Earth.
Only the International Space Station (ISS) has cost more in terms of a single project.