For many decades, Olympic Games included "demonstration sports." Some, like curling, became part of the permanent roster. But others, like skijoring, didn't stick around.

About 2,000 years ago, the Romans built the Arena di Verona to host gladiator games. After weathering an earthquake in 1117, a stint as a quarry and hundreds of years of operas and concerts, the venue played host to the Olympic closing ceremony on Sunday,

Following one of the most drama-filled figure skating events in recent memory, ice dance will be changing after the Olympics.