Bird’s nest soup is another expensive Asian delicacy. It is made from edible nests from a species of birds known as ‘swifts’ that live in caves and make their nests from saliva. The high price tag is perhaps due to how difficult it is to harvest these nests, which are generally found on the side walls of caves. Royalty has been eating bird’s nest soup for centuries, and it is believed that this dish can increase sexual vitality. To this day it is known to be one of the priciest animal dishes available anywhere in the world, so make sure that you make a special event of it if you are trying it out.