The Eiffel Tower is a wrought-iron lattice tower on the Champ de Mars in Paris, France.

Big Ben is the nickname for the Great Bell of the clock at the north end of the Palace of Westminster in London.

The Leaning Tower of Pisa is a freestanding bell tower known for its unintended tilt.

The Washington Monument is the world's tallest stone structure and obelisk.

The CN Tower is a 553.3 m-high concrete communications and observation tower located in Downtown Toronto, Ontario, Canada.

Tokyo Skytree is a broadcasting and observation tower in Sumida, Tokyo.

The Abraj Al-Bait is a government-owned megatall complex of seven skyscrapers in Mecca, Saudi Arabia.

The Space Needle is an observation tower in Seattle, Washington, a landmark of the Pacific Northwest, and an icon of Seattle.

Tokyo Tower is a communications and observation tower in the Shiba-koen district of Minato, Tokyo, Japan.

The Prague astronomical clock, or Prague orloj, is a medieval astronomical clock located in Prague.