There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
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There is a fake village with fake shops and restaurants that is actually a care home for elderly dementia sufferers in the Netherlands.
7
Some nursing homes in Germany have fake bus stops to keep Alzheimer's patients from wandering away.
14
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7