Which zoo has the tallest exhibit for mountain animals, top to bottom?
And related - which zoos built the tallest artificial rocks (not necessary that animals can climb to the very top)?
Does the first question mean it does not have to be an artificially built mountain? If not then the bighorn sheep exhibits at Phoenix Zoo and The Living Desert might be contenders. They are existing rock mountains that were just fenced off at the bottom for the bighorns to use.
I think the 'Grand Rocher' in Zoo Vincennes in Paris is a good contender for being the tallest artificial rock. With a height of 65 meters. There are a couple of exhibits on the foot of the rock and house for European amphibians, reptiles & fish within a part of the rock. But none on top of the rock itself.
There will be higher rock walls than this in many international zoos, but in South Korea, the rock walls in the Daejeon O-World's Himalayan tahr and Barbary sheep exhibit is the highest.
I took this photo at 07/28/2017.
This rock wall has been around since the opening of Daejeon O-World in May 05 2002. that was originally built by to raise the Rocky mountain goat donated by Calgary Zoo in April 2002, but the all Rocky mountain goat at there are died now. So now Himalayan tahr and Barbary sheep are using this cliffs.
Not an ungulate exhibits, also a rock mountain in Japanese macaque exhibit at the Seoul Zoo is quite high. I've never seen it detail because it is placed on the children's zoo side, that separated from the Seoul Zoo's main zoo. but I've seen it from afar several times on going to the main gate of the Seoul Zoo, it was quite high.
Chimelong Ocean Kingdom has a huge mountain. There are brown bear exhibits built into one side and sadly the interior holds polar bears and an assortment of other arctic animals.