The term 'lowest places' can be summarized as the most extreme depths or depths that are the furthest away from the surface. The crossword solution for this term is 'lasts, ' which can refer to the last remaining depths or the depths that are the furthest away from the surface. This term can be used to describe a variety of different locations, such as the deepest parts of the ocean, the deepest caves, or the lowest points on a mountain range.