For those that have dreamt of tying the knot in a subterranean cave, Niagara actually has a beautiful underground chapel, where you can say your vows while going “wow.” Don’t worry though, even if you aren’t planning to settle into matrimonial bliss, the cave has some interesting guided tour options that take visitors through a mile long fossil network going back more than 450 million years. Plus there are mammoth cave formations, and a picturesque waterfall. The longish cave has huge rooms and elevated ceiling passageways. Oh and did we mention, you can go gemstone or fossil combing or enjoy a round of mini-golf inside the cave? There’s also a cute souvenir shop, along with a bunch of helpful staff members to guide you through the caverns.