[SunkenCiv]

the writer forgot "none of the above".

Machu Picchu is encircled by the Urubamba River (pictured), considered sacred by the Inca. Photograph by Michael and Jennifer Lewis, National Geographic

[cripplecreek]

A really snazzy outhouse?

[beebuster2000]

the truth is actually pretty simple

the world was a lot colder then, and it was basically a ski resort

[humblegunner]

Machu Picchu was a place where Pablo, in the past, was very wily.

[allmost]

I’d say #3. They didn’t have a written language to spread and relied on quipu to relay commands to the faithful. There was no utilization of the wheel to spread their empire. The only place to go was up.

[BwanaNdege]

Time Share

[mountainlion]

They had to build that high to get above the snow during the last ice age.

[Mr. Jazzy]

“Over Macho Grande? No, I’ll never get over Macho Grande!”

[NYCslicker]

These indians were seers and soothsayers.

It was built to honor the later coming of Reagan to earth. . . .

[colorado tanker]

I sure don’t know. I think it must have been sacred or otherwise very special because it was built in a ridiculous location, even for the Incas.

[Lando Lincoln]

Machu Picchu is the most amazing place I have visited.

[ConservativeTeen]

/”History” Channel mode

Clearly Macchu Picchu was built to honor the ancient aliens that visited the Americas.

[Harmless Teddy Bear]

Or the Inca never built it at all.