Final answer:
Seattle is the largest city in Washington, situated on an isthmus between Puget Sound and Lake Washington, known for the Space Needle, Pike Place Market, and its seven hills.
Step-by-step explanation:
The largest city in Washington, known for its storage space and unique landmarks such as the Space Needle and Pike Place Market, is Seattle. Situated on an isthmus between Puget Sound and Lake Washington, Seattle is notable for its topography characterized by seven hills and its harbor on Elliott Bay.
This city, with its rich history, bustling harbor, and notable sites, is a hub of culture and technology within the Pacific Northwest and a prominent example of a city with trade site location advantages.