No, it's not an April Fool's joke. There really is a Butterfly Sanctuary in the airport! I had quite a lot of fun whilst waiting 11 hours for my flight to Australia at Changi Airport in Singapore. Ate good food, surfed the Internet, visited an exhibition, recharged my ipod, took a power nap, sent postcards and 6,5kgs of excess luggage, and even went swimming in the rooftop pool!