3. Area 51, United States
There may be no spot on Earth that has generated as many conspiracy theories as Area 51 in the Nevada desert, USA. The spot is a heavily guarded and hidden military base, and no regular person really knows what goes on there.
The most common urban myth is that Area 51 is used for alien testing, but of course, no one has proof of that. All of the world’s governments maintain that there has never been any evidence of alien visitation on our planet. Whatever happens at Area 51, we don’t recommend attempting to breach its security – the spot is heavily protected with landmines and other high tech security.