The iron lattice tower, erected for the 1889 World Fair, became the symbol of the capital city of France.
This animation demonstrates how an escalator works.
Tower cranes are machines used for lifting loads weighing up to several tonnes.
Industrial estates provide infrastructure and services for companies.
Burj Al Arab, the world's only seven-star luxury hotel is located in the United Arab Emirates.
Saving energy and protecting the environment are important factors in the design of modern office buildings.
Tall buildings are mementoes of human history and technological development.