An underwater robotics expert is exploring nearly 100 targets in Seattle's Lake Union, calling the area a "shipwreck city" full of hidden maritime history.
Tennessee Valley, a popular Marin County hike, ends in ruins.
Narcity on MSN
This tiny Ontario beach town is the 'Shipwreck Capital of Canada' with over 20 sunken ruins
You can swim over these underwater wrecks.
You don’t reel in one of those every day.
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