A hallucination is a perception in the absence of external stimulus that has qualities of real perception. Hallucinations are vivid, substantial, and are perceived to be located in external objective space.
Construction begins on Poland's tallest tower by Foster + Partners. Work has started on a 310-metre-high Warsaw skyscraper by Foster + Partners, expected to become the tallest building in Poland. The Varso Tower, or Warsaw Tower, is now under construction on a brownfield site next to the Warszawa Centralna railway station, with completion slated for 2020.
The Taipei 101 Tower. Measuring 509 meters (1,670 feet) tall, the Taipei 101 Tower in Taipei, Taiwan is widely considered the world's fourth tallest building. But, like the Burj Dubai, the Taipei 101 Tower gets much of its height from a huge spire.