Great Wall of China:
Over 2,000 years of construction and defense
Stonehenge:
Built in stages, construction took 1,500 years
Machu Picchu:
Incan masterpiece built across multiple centuries
Cologne Cathedral:
Took over 600 years to fully complete
Angkor Wat:
Construction spanned several centuries in Cambodia
Milan Cathedral:
600 years to finish this Gothic beauty
Petra:
Ancient city carved into stone over centuries
Sagrada Familia:
Still under construction, started 140 years ago
Taj Mahal:
Took 20+ years, intricate marble detailing extended timeline
Pyramids of Giza:
Built over 85 years, awe-inspiring engineering feat
Chichen Itza:
Mayan city developed gradually over 1,000 years
Notre Dame Cathedral:
Took nearly 200 years to fully construct
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