Misc: according to arthurian legend, what did king arthur receive as a dowry?

Questions

The United States would fit into the continent of ------------ three and a half times.?

The city of --------- used to be known as Puerto Rico (which means "rich port" in Spanish), while the island of Puerto Rico was originally named San Juan.?

The water of the ----------- is seven to eight times saltier than ocean water.?

The white cliffs of ---------- is a natural landmark located at the southern coast of England. The distinctive color of the cliffs was actually created by the accumulation of skeletal remains of tiny organisms deposited over thousands of centuries. Sea level was higher millions of years ago, and after the waters receded, the whitish residual remains of the creatures were exposed.?

The --------------- is not a sea, but a landlocked salt lake, 45 miles long by 9 miles wide.?