Sydney Opera House
The Sydney Opera House is an iconic performing arts center in Sydney, Australia, famous for its distinctive sail-like architecture and high construction costs.
Estimated value as of 2026 · Source: Sydney Opera House official website (adult tour ticket)
Fun Fact
The Sydney Opera House cost approximately A$102 million to build (about US$1.2 billion in 2025 dollars), 14 times over its original budget estimate.
Price History
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Mars Rover
The NASA Perseverance Mars Rover is a flagship-class robotic explorer designed to search for signs of ancient microbial life on Mars, launched in 2020 and landed in 2021.
Declaration of Independence
The original 1776 document declaring American independence from Britain.
The Cullinan Diamond
The Cullinan Diamond is the largest gem-quality rough diamond ever found, weighing 3,106.75 carats, discovered in 1905 in South Africa and cut into multiple gems now owned by the British Crown Jewels.
Crown Jewels of England
A collection of royal regalia including crowns, scepters, and jewelry estimated at over $3 billion.