The Clock Puzzle

Clue 1

This clock is located in one of the busiest and most famous stations in the world. The Grand Central Clock sits atop the information booth in Grand Central’s main station. The clock is made of brass and its four faces are made of opal. A compass sits on top of the timepiece, which recently helped to ring in Grand Central’s 100th birthday.

Clue 2

The Glockenspiel only marks the time twice - at 11 am and noon every day, however, it also chimes at 5 pm between March and October. The chiming clock has 43 bells and is situated in Marienplatz square in the tower of the Neues Rathaus. When it rings, 32 life-sized figurines act out various events from the city's history, including the wedding of Duke Wilhelm V to Renata of Lorraine. Each show runs for about 15 minutes and finishes with a golden bird emerging at the top and chirping three times.

Clue 3

This clock holds the record for the world’s tallest clock tower (140 feet), it houses one of the world’s tallest hotels (Fairmont's 76-storey Makkah Clock Royal Tower), and boasts the world's largest clock face (42 metres wide). The clock also marks daily prayers with calls announced to the Muslim world from the tower's loudspeakers which are audible six kilometres away.

Clue 4

Maybe the only large clock you can actually ride, this clock is fixed on one of the largest Ferris wheels in the world (369 feet tall). First built for a 1989 exposition, the wheel and clock lights up at night and offers great views of the city in which it sits. This city is the second largest by population in its country. It takes 15 minutes for one rotation – in case you were timing.

Clue 5

Made of marble and stone, this sundial may not have the latest technology but it is so accurate there is just a 2-second margin of error – day or night. This "Supreme Instrument" was commissioned by Maharaja Sawai Jai Singh II in 1728 and is the biggest sundial in the world. Visitors can climb a flight of stairs on the gnomon (the part of the sundial that casts the shadow) to check the time from above.

Clue 6

This floral clock is on the Canadian side of a place named after three waterfalls that straddle the international border between Canada and the United States. The clock features up to 20,000 seasonal flowers and plants and the design changes twice a year.

Clue 7

This astronomical clock is believed to be the oldest one in the world still operating. Built in 1410, the clock features a dial which shows the position of both the sun and moon as well as a calendar dial to show the date and the zodiac sign for each month of the year. On the hour, every hour, wooden figures of the 12 apostles and other figurines move through the window above the astronomical dial. The city in which the clock resides is the 14th largest city in the European Union and is located on the Vltava river.

Clue 8

Perhaps one of the most significant timepieces in the world, this clock is mounted on the wall of an observatory marking the Prime Meridian of the World at 0 degrees longitude. All other locations on Earth are measured using this line as a reference point. Installed in 1852, the clock is controlled by a master clock inside the building.

Clue 9

This ceiling-mounted clock in the Cevahir Shopping Centre is one of the largest in the world with a face that is 35 meters in diameter. It only shows the numbers 3, 6, 9 and 12, but with each being 3 metres tall, you won’t have any trouble telling the time!

Clue 10

This City Hall held the title of tallest building in the world from 1901 - 1908, with a height of 548 feet. The famous tower has four clocks – one on each side. Each of the clocks is 26 feet in diameter. The building is topped by a 37 foot, 27-ton bronze statue of city's founder William Penn, which is the world's tallest statue atop a building.

Clue 11

This clock sits on the Spasskaya Tower which overlooks a famous square. The Tower was built in 1491 by Italian architect Pietro Antonio Solari. According to a number of historical accounts, the clock on the Spasskaya Tower appeared between 1491 and 1585. It chimes on the quarter hour, with bells tolling for each full hour.

Clue 12

This clock sits on a 245 foot clock tower and with the Beaux-Arts building was a primary point of arrival and departure from 1898 until the construction of a famous bridge in the late 1930s. Inside, a 660-foot-long skylit atrium that once provided access to ferries now houses shops and restaurants.