Contemporary architectural landmarks can also be found amongst the skyscrapers of the Central business district. Look for the instantly recognizable round windows of Jardine House, the office tower owned by Jardines (as in Jardine, Matheson & Co., the British trading company that was once famously involved in opium smuggling). Jardines today is a diversified business group with numerous investments (especially in Asia) including the Mandarin Oriental Hotel Group, Dairy Farm International Holdings, and Hongkong Land.