Misc: what's the longest tendon in the body?

Questions

Reykjavik, --------------- is likely the cleanest capital city in the world.?

The Oregon Trail (1840-1860), the route used during the westward migrations of the United States, started in ------------- and ended in Oregon and was about 2,000 miles long.?

Ruby Falls, America's highest underground waterfall open to the public, is located on historic Lookout Mountain in Chattanooga, ---------------?

The peacock is the national bird of ---------?

The Philippines is an archipelago of 7,107 islands in the ----------------?