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Jam Gadang, Indonesia - A well-known landmark in the city of Bukittinggi, this clock tower stands 26 m and dates back to 1926, when the area was under Dutch colonial rule.

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Puerta del Sol, Spain - The Puerta de Sol square in Madrid is one of the most prominent locations in the Spanish capital, and a popular meeting point. The square's oldest building is the Real Casa de Correos, the location of the famous clock tower that was built in the 19th century and donated free of charge to the town hall by José Rodríguez de Losada.

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Orloj, Czech Republic - In Prague's historic Old Town stands this impressive medieval astronomical clock, which has become a cherished symbol of the city and one of the most fascinating visitor attractions in the Czech capital.

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Orloj, Czech Republic - The three main components of the clock are the astronomical quadrant, which in addition to indicating the 24 hours in a day, represents the positions of the sun, the moon in the sky; the animated figures representing the twelve apostles; and the circular calendar.

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Big Ben, England - Big Ben is the nickname for the great bell of the clock located on the north end of the Palace of Westminster. The palace and its clock tower is one of the most recognized buildings in the world and a popular London landmark.

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Big Ben, England - When the tower was completed in 1859, its clock was the largest four-faced striking and chiming clock in the world. Originally named the Clock Tower, today it's officially known as the Elizabeth Tower for the 2012 Diamond Jubilee of Queen Elizabeth II.

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St Mark's Clock Tower, Italy - Designed by Mauro Codussi and built between 1496 and 1499, the clock looms over Piazza San Marco in Venice. The impressive structure remains a symbol of the city.

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St Mark's Clock Tower, Italy - The clock face features the 12 symbols of the zodiac fashioned out of gold. They revolve slightly slower than the hand to mark the position of the sun in the zodiac.

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Torre del Reloji, Cartagena, Colombia - Sometimes referred to as the Puerta del Reloj, this is the main entrance to the historic center of Cartagena.

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Pisagua Clock Tower, Chile - This monumental clock tower is recognized as a city symbol of Pisagua and Chile itself. The tower's architecture and coastal location make it a fascinating landmark.

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Monumental Tower, Argentina - The Monumental Tower (formerly Tower of the English) is located in the city's Retiro neighborhood. It was a gift from the city's expatriate British community to commemorate the centenary of the 1810 May Revolution.

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Clock Tower, Iquique, Chile - The Clock Tower of Iquique is located in Arturo Prat Square and dates back to 1878. Declared a National Historic Landmark in 1987, it is a fascinating tourist attraction.

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Moorish Tower, Equador - The ornate Clock Tower, or Moorish Tower, stands tall in Guayaquil and is celebrated for its architectural flourishes and unique design.

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Rathaus-Glockenspiel, Germany - One of Munich's most cherished historic buildings features a clock that chimes every day at 11 am, at noon, and at 5 pm, delighting audiences with a mechanized display of dancing and medieval jousting.

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Chiang Rai Clock Tower, Thailand - A centerpiece feature of a city roundabout, the Golden Tower provides a show of light and sound every evening at 7, 8 and 9 pm. The highly ornate tower was designed by Thai artist Chalermchai Kositpipat and draws tourists from all over the world.

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Dolmabahçe Clock Tower, Turkey - The imposing Dolmabahçe Clock Tower stands more than 20 m and dates back to 1890. It was designed by architect Sarkis Balyan, under the command of Sultan Abdulhamit.

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Esmirna Clock Tower, Turkey - Delicate in appearance, the clock tower was built in 1901 to a design by French architect Raymond Charles Péré to commemorate the 25th anniversary of Abdulhamid II's accession to the throne. It remains one of the country's most important historic landmarks, and is a popular tourist attraction.

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Town Hall Clock Tower, Gdansk, Poland - Gdansk's landmark clock tower stands out for its characteristic Gothic facade. It was built between the 13th and 14th centuries and is one of the Poland's architectural reference points. 

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Montreal Clock Tower, Canada - The Montreal Clock Tower is located on the Quai de l'Horloge, in the city's old port district. The structure rises to over 40 m and stands as a memorial to lost sailors.

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Old City Hall, Canada - Located at the intersection of Bay Street and Queen Street in Toronto, the building dates back to 1899 and houses a clock tower that was once the tallest structure in Canada.

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Rajabai Clock Tower, Mumbai - The University of Mumbai is known for its monumental clock tower. Standing more than 80 m tall, the tower was designed by English architect George Gilbert Scott and completed in 1878.

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Sydney Town Hall, Australia - Sydney Town Hall, which stands opposite Queen Victoria Building and next to St. Andrew's Cathedral, incorporates a clock tower and is a prominent feature of the city.

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Clock Tower, Hong Kong - This is the only remaining part of the former Kowloon Railway Station, which served the Kowloon-Canton Railway. Built of red bricks and granite, the clock tower stands more than 40 m tall and is one of Hong Kong's most interesting monuments.

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Ferry Building Marketplace, San Francisco - Crowning a San Francisco market building, this clock tower serves as a focal point for shoppers looking for organic produce and a place to eat—the square is renowned for its shops and restaurants.

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Sultan Abdul Samad Building, Malaysia - Crowned with onion domes, the building blends Arabic and British architectural design influence. The historic clock tower symbolizes Malaysia's independence from the British,which was declared at midnight on August 31, 1957.

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McKee Clock Tower, Northern Ireland - The McKee Clock Tower is found in the town of Bangor. The clock is named after William McKee, a local collector who donated around £200 towards its construction.

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Tirana Clock Tower, Albania - This modest clock tower was erected by order of Haxhi Et'hem Bey and built by Ottoman architects. It stands 35 m high, can be climbed, and offers impressive city views.

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Zamosc Tower, Poland - This Renaissance landmark was built between 1639 and 1651 and was refurbished in the 18th century. The building's prominent feature is the 52 m clock tower.

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Yangon High Court Building, Myanmar -

The city's former High Court Building is noted for its clock tower. The red brick building dates to 1911.

See also: Classic paintings with secret messages

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