What’s the most mind blowing place you’ve ever been to?

I've visited the battlefield at Bull Run (American Civli War era) in Virginia where nearly 4,700 men died and thousands were injured during the span of a day owing to poor training, over-confidence and ass-backwards leadership
The rolling hills there are covered in beautiful, tall grasses and wildflowers and it looks like the perfect spot for a family picnic
I don't believe in ghosts or anything weird but that place feels haunted even on a bright, sunny day

I went deer hunting about 30 minutes North of Kingston in upstate New York once, climbed hundreds of feet up a rough slope to scout a valley down below...the mist rising up from the rivers way down there made me feel like I was the last person left in the world...it was beautiful
I found a few deer tracks but they seemed fairly worn...days old!
Then I found bear sign (scat and clawed trees)
After an hour of poking about I located the bear den and approached...empty!
* had I found the bear and shot it in it's den that would have been against game laws...I was just curious (and young and stupid!)
So I set up a blind as quietly as I could and waited for a couple of hours...
No bear:(
On the way down the hill I encountered my hunting partner who had elected to lean up on a stump and get wasted, and I had to walk him down and out of the woods
As I was driving out of the area I passed at least a dozen big tasty looking deer on people's front lawns and driveways...I'd swear several of them were laughing or winking at me;)
Deer always seem to know where they wont get eaten lol

The first and only time I've ever seen a wild monkey, scorpion or 4 foot Iguana was in the Yucatan, Mexico
Mexico has wildlife that can scare the hell out of you
Beautiful country, the crystal clear waters make it feel like a divers paradise but the fish are bigger than you and not shy about letting you know it

Still Niagara Falls. All that water and it never stops.

Sudwala Caves, South Africa. I think the whole country is amazing. Elephants are my absolute favourite animals, and seeing them there was amazing, but these caves were so huge. It was a really cool experience. I think that our experiences are what can make a place amazing.

Osa Penisula , Costa Rica. Again I had just an amazing experience there with everything I did. Hiking, diving, zip lining. It was all incredible. Corcavado National Park is so beautiful.

Half Moon Caye, Belize. There is a nature reserve on the island with red footed boobies which is neat, but the diving there was mind blowing. The blue hole is an experience, but because the marine life is protected in lighthouse reef, it was something I'll never forget. The diving off of Ambergris Caye was great as well.

Niagara
Grand Canyon
The House On The Rock
https://en.wikipedia.org/wiki/House_on_the_Rock

Uluru in the center of Australia (formerly known as Ayres Rock). Amazing place

New York City and Cuba

Parts of England. It was just kind of enchanting and, for me, probably the first time I've ever experienced both a surreal feeling of otherness AND at the same time being utterly at home - almost like I had found my way back rather than just arriving. It was like I'd been there before, but I was also seeing it all for the first time. Hard to explain.

Machi Picchu! It was amazing.

Graceland! Elvis' home.

Paris! I went in summer and it was amazing.

The Great Wall of China! One of those places that you wonder whether you'll ever see and I did (ditto Christ statue in Rio, Statue of Liberty, David Statue and Empire State.)