The International Peace Garden is one of the world?s most significant tributes to peace and can be found on the world?s longest unprotected boundary connecting 2 countries, US and Canada. The Toronto Convention for the Professional Grounds Management Society in 1929 served as the birthplace of the idea of creating the garden. On the 14th of July 1932, the International Peace Garden was established. It sits on a 2,300 acre-land that is planted with more than 150,000 flowers every year. Inside, visitors can marvel at flower gardens, fountains, beautiful landscapes and botanical areas. Other features include the Peace Chapel with its twin towers that is 120 feet high, an 18-foot flower clock and the 14 chimes of the Arma Sifton Bells. Later on, a memorial for the World Trade Center attack was added and features some parts of the wrecked World Trade Center building in its design.