The Gay Pride - Gay Pride Amsterdam, a.k.a. the ‘Gay Parade’, is one of the most popular gay pride celebrations in the world. The weekend's  organized street parties and club events draw more than 350,000 visitors each year. Gay and straight locals and visitors flock to the city centre for a  truly unforgettable sight on the first Saturday in August. Dozens of decorated boats filled with extravagantly costumed revellers float through the  Prinsengracht canal, towards the Amstel river. The thousands of spectators and hundreds of boats meet up, and keep the part going on the river near  Waterlooplein.

http://www.amsterdamgaypride.nl/