Leaning Tower of Pisa (Italy) A weak foundation caused this bell tower to tilt during construction in the 12th century — but the lean made it world-famous
Eiffel Tower (France) Originally criticized and meant to be dismantled after 20 years, it survived — now it’s Paris’s pride
The Sagrada Familia (Spain) Started in 1882 with many design changes over time, it's still unfinished — a 'mistake' that became a masterpiece
Qutub Minar (India) Some historians believe it was meant to be a victory tower, others say a minaret — its original purpose is still debated
Statue of Liberty’s Color (USA) Originally copper-colored, oxidation turned it green — a chemical “mistake” that created its iconic look
Tower of London’s Ravens (UK) Ravens were never meant to live there, but a myth led to their permanent residence — now they're part of royal tradition
Dome of the Rock (Jerusalem) Initial plans didn’t include the golden dome — the striking look came after changes during construction
Mont-Saint-Michel (France) A small abbey grew over centuries with inconsistent styles due to construction delays and changes
St. Basil’s Cathedral (Russia) Tsar Ivan’s bold order changed the original plain design into a colorful, whimsical icon — by “mistake”
Washington Monument Crack (USA) Funding issues paused work for decades — resulting in a visible color change halfway up the obelisk