Today, at 167 meters high, the recently opened High Roller in Las Vegas has that distinction. Just behind are the Singapore Flyer and Star of Nanchang in China.
It mysteriously disappeared last Wednesday as it was travelling from the southernmost tip of Argentina back to its home port in Mar de Plata, which is a couple of hundred miles south of Buenos Aires.
A team with Oxford University’s Wildlife Conservation Research Unit, supported by a charity organization, spent two nights in November camping in a national park in northwest Ethiopia, on the Ethiopia-Sudan border.
And it's where the American leader received a large and warm welcome when he spoke at the world's biggest cricket stadium in the Indian city of Ahmedabad.