According to chaos theory, a butterfly's wings can trigger a chain reaction that leads to hurricanes, tornadoes, or birthday candles blown out before you complete your wish. Discover the real reason why you didn't get that pony with this Groupon.

$20 for Four General Admission Tickets (Up to $52 Value)

Patrons can explore an indoor tropical garden fluttering with more than 2,000 butterflies and exotic birds from around the world, and can also discover an insect collection and interactive educational exhibits, including Canada's Waterscapes, extended through early October. Children aged 2 and younger are admitted for free.

Cambridge Butterfly Conservatory is open seven days a week from 10 a.m. to 5 p.m. (with the last admission sold at 4 p.m.), and is wheelchair accessible and offers free parking. The conservatory is closed on Mondays from October 15, 2012 to March 1, 2013.

Cambridge Butterfly Conservatory

Fluttering wings fill the sky in a flash of colour as more than 2,000 free-flying tropical butterflies take off across the Cambridge Butterfly Conservatory. Ranging in colour and size, the insects hail from both Costa Rica and the Philippines and include 40 different species, such as the Blue Morpho butterfly, the Emerald Swallowtail, and the Owl butterfly. With the help of a full-time traffic-control tower, the butterflies share the airspace with exotic bird species, while larger creatures such as red-eared slider turtles patrol the ground. Along with the flurry of flapping wings, the Conservatory buzzes with the giggles of children as they explore permanent exhibits on honeybees, and fill their tummies with treats from the Paradise Garden Cafe.

Though Cambridge Butterfly Conservatory sometimes features a discounted price online, this Groupon still offers the best deal available.