Nestled in Moscow's Red Square, this architectural marvel captivates with its vibrant onion-shaped domes, each boasting a unique design. Commissioned by Ivan the Terrible in the 16th century, the cathedral was intended to commemorate his victorious conquest of Kazan. Legend has it that the tsar was so impressed by the cathedral's beauty, he had its architect blinded to prevent him from recreating anything similar elsewhere. Its interior is just as intriguing, with narrow passageways and intricate frescoes. The structure's colourful, whimsical appearance makes it one of the most photographed and iconic symbols of Russia.