5.Crown Jewel: $591 Million

5.Crown Jewel: $591 Million

4.The Antilia Mansion: $2 Billion

4.The Antilia Mansion: $2 Billion

3.Hubble Space Telescope: $2.1 Billion

3.Hubble Space Telescope: $2.1 Billion

2.History Supreme Yacht: $4.8 Billion

2.History Supreme Yacht: $4.8 Billion

1.International Space Station: $150 Billion

1.International Space Station: $150 Billion