Earth is a curious place. Although many people are fascinated with the stars, there are many curious things to explore here on Earth. Although I can not post all things curious, I can start with a few.
The Ark of the Covenant:
The Holy Grail
The Antikythera Mechanism
The Voynich Manuscript
Of course, all of Egypt (Including the Giza Pyramids), Greece, and the old castles are amazing too.
There will be a Part #2 eventually, but this should keep you thinking.