Billed as the largest free nautical event in the world, Sail Amsterdam is a quinquennial (every five years) gathering of 600+ boats and tall ships that sail in a circuit in the Netherland’s North Sea Canal before mooring in Amsterdam. The 2015 event was held just last week and according to the NL Times a record-breaking 2.7 million people arrived to watch the maritime spectable that included at least 50 tall ships and hundreds of smaller watercraft. This aerial photo and a timelapse filmed by Boyd Baptist really captures the enormity of the event. (via Jeroen Apers)