A city well known for its canals, windmills and tulips – It’s Amsterdam! The city is widely considered as the ‘Sin City’ of Europe, but it has a lot more to it than people think. One can find many Indonesian restaurants, tasty Dutch street food. Bloemenmarkt – floating flower market that has been around since 1862. Amsterdam is known as the International hub of diamond grading and polishing and it has been that way for the last 400 years. Coster Diamonds is the oldest diamond polishing factory in the world and their tours do a great job of showing how a diamond is cut, polished and graded.