5 tallest buildings in the world: Giants of modern architecture (photos)

As cities around the world continue to expand and populations grow, architects and engineers are pushing the boundaries of what is possible in vertical construction.

Here are the five tallest buildings in the world, each considered a marvel of modern architecture and technology.

Burj Khalifa, Dubai, UAE: 829.8 meters

Merdeka 118, Malaysia: 678.9 meters

Warsaw Radio Mast, Poland: 646.4 meters

Tokyo Skytree, Japan: 634.0 meters

Shanghai Tower, China: 632.0 meters