Not sure where I'd go first but basically I'd be hitting up every place with information I'm not supposed to have.
That little underground room beneath the Sphinx is an obvious one. The non public sections of the Vatican library. The records rooms at various intelligence and military facilities.
There's supposedly some weird tower things on our Moon and one of the moons of Mars. I'd have to put on space suit and pop by to see if they look artificial. Same with Oumuamua.
Have to check the funny shaped mountains in Antarctica too to see if they are really pyramids.
If time travel is on the table I'd have to stop by the original Library of Alexandria. I'd like to stroll through Doggerland (en.wikipedia.org) before it flooded. I'd probably go back in time to Jesus's tomb to see if he really rose from the dead too. Also I wanna see a woolly mammoth.