Misc: What is the most westerly terminus of the Piccadily line?

Questions

The Amazon river pushes so much water into the ------------- that, more than a hundred miles at sea, off the mouth of the river, one can dip fresh water out of the ocean and drink it.?

The streets of --------- were lit by gaslights for the first time in 1807. Before that, torches were used.?

The ancient cavern system of Ka`eleku Caverns at Hana on the Hawaiian island ------, was created from hot molten lava flowing 30,000 years ago. Tourists can hike with experienced guides deep into the subterranean passages of one of the world's largest lava tubes.?

The Arctic ocean is the smallest and -------------?

The territory of French Polynesia covers an area, including inland water, of about 1,550 square miles. The capital is ------------ on the island of Tahiti, the largest of the islands. There are 130 French Polynesian islands in all.?