Copenhagen Zoo Vesterbro & Frederiksberg

Located up on Frederiksberg (Frederik's Hill), Copenhagen Zoo rustles and rumbles with more than 2500 critters, including lions, zebras, hippos and gorillas. The zoo's state-of-the-art elephant enclosure was designed by English architect Sir Norman Foster, while the Arctic Ring enclosure allows visitors to walk right through the polar-bear pool for some spectacular close encounters with those deceptively cuddly-looking beasts.