The major Mackenzie River empties into the Canadian part of the sea , west of Tuktoyaktuk , which is one of the few permanent settlements on the sea shores .
The Mackenzie River empties into the Canadian part of the sea .
The Itza had their capital at Tayasal ( also known as Noh Petén ) , and people who study the Maya civlisation think what 's left of this city is below the modern city of Flores , Guatemala on Lake Petén Itzá .