Philadelphia City Hall – Philadelphia City Hall, Philadelphia
Height: 167 meters (548 feet)
Chief architect: John McArthur, Jr.
While ascending to the Philadelphia City Hall's observation deck in a tiny elevator, visitors can see the internal workings of the tower, the four big clocks as well as views away from the tower.
Standing on the top of the tower is a 37-feet-high bronze statue of William Penn, the founder of Pennsylvania and planner of Philadelphia. Next to Penn are four smaller bronze statues depicting the first people in Philadelphia -- immigrants from Sweden and Native Americans.
More facts on Philadelphia City Hall in the next slide.
Old Town Astronomical Clock (Prague) – Old Town Astronomical Clock, Prague, Czech Republic
Height: 59 meters (193 feet)
Builders: Co-built by clockmaker Mikulas of Kadane and Jan Sindel, a mathematics and astrology professor at Charles University in Prague.
For $5, visitor can tour the tower and access the observation deck, which sits above the clock.
Each hour from 9 a.m. to 9 p.m., models of the Twelve Apostles are set in motion. Each has a distinctive feature -- St. Peter for example is holding a key (to the Kingdom of Heaven). Other figures standing next to the dial include a Grim Reaper and a man looking into a mirror, representing mankind's vanity.
More on Prague's Old Town Astronomical Clock the next slide.
Old Port Clock Tower (Montreal) – Old Port Clock Tower, Montreal
Height: 45 meters (148 feet)
Free to access between May and September with 192 steps to ascend.
From May to September, a temporary urban beach opens at the base of the Clock Tower. The beach has a restaurant, a bar, showers and live entertainment at night.
There's no direct access to the water, due to strong currents.
More on the Old Port Clock Tower on the next slide.
Izmir Clock Tower (Izmir, Turkey) – Izmir Clock Tower, Izmir, Turkey
Height: 25 meters (82 feet)
Architect: Raymond Charles Pere
There are four small fountains at the base of the tower.
The clock was a present from German emperor Wilhelm II to Sultan Abdulhamit II of the Ottoman Empire as a gesture of friendship.
Izmir Clock Tower, Konak Sqaure, Izmir, Turkey
Sultan Abdul Samad Building's Clock Tower (Kuala Lumpur) – Sultan Abdul Samad Building's Clock Tower, Kuala Lumpur, Malaysia
Height: 40 meters (131 feet)
Architect: A.C. Norman
Topped with a golden dome, the building is a blend of Moorish and British design.
More on the next slide.
Chiang Rai Clock Tower (Thailand) – Chiang Rai Clock Tower, Chiang Rai, Thailand
Designer: Chalermchai Kositpipat
Standing as the centerpiece of a roundabout in the city, the golden tower puts on an audio and light show every night at 7, 8 and 9 p.m. The tower was designed by Thai artist Chalermchai Kositpipat, who also built the White Temple in Chiang Rai.
Chiang Rai Clock Tower, Phaholyothin Road and Banpaprakan Road, Chiang Rai, Thailand