The largest building in the world is the Boeing building in Washington state. It is used to assemble planes, and is so large that Disneyland could fit inside.
Taipei 101, the second tallest building in the world uses a 728 ton pendulum to counter the force of wind on the building. It is suspended from the 87th to the 92nd floor.
The largest shopping mall in North America is located in Edmonton, Canada. It is more than 5 million square feet, and attracts more than 32 million visitors each year. It also has a Bitcoin ATM machine.