A visitor slid down an ice slide at the Ice and Snow World during the opening ceremony on Jan. 5. (AFP/Getty Images) #

People visiting Ice and Snow World watch as fireworks fill the sky at the opening ceremony. (AFP/Getty Images) #

Visitors ride on a horse cart among large ice sculptures at the 29th Harbin International Ice and Snow Festival, in Harbin, Heilongjiang province, northern China, on Jan. 6. The three-month-long subzero festival is in its 29th edition, attracting both foreign and local visitors. (Diego Azubel/European Pressphoto Agency) #

People visit the Ice and Snow World at the opening ceremony of the 2013 Harbin Internatoinal Ice and Snow Festival in Harbin, in northeast China's Heilongjiang province. (AFP/Getty Images) #

A visitor posed before a snow sculpture in Ice and Snow World at the opening ceremony. (AFP/Getty Images) #

This year's Ice and Snow World features majestic ice castles and sculptures of fairytale characters equipped with LED lights, bringing a colorful and warm aura to the icy wonderland. (AFP/Getty Images) #

Fireworks burst in the sky over the Ice and Snow World at the opening ceremony of the 2013 Harbin International Ice and Snow Festival on Jan. 5. (AFP/Getty Images) #

A woman walks inside a tunnel made of ice blocks at the 29th Harbin International Ice and Snow Festival in Harbin, China's northern Heilongjiang province, on Jan. 5. (Diego Azubel/European Pressphoto Agency) #

Divers perform with Beluga whales inside a tank at the Harbin Polarland Aquarium on the sidelines of the 29th Harbin International Ice and Snow Festival, in Harbin, Heilongjiang province, northern China, on Jan. 6. The aquarium is one of several local highlights that attracts tourists who are in town for the International Ice and Snow Festival. (Diego Azubel/European Pressphoto Agency) #

Penguins swim inside a tank at the Harbin Polarland Aquarium during the 29th Harbin International Ice and Snow Festival. (Diego Azubel/European Pressphoto Agency) #

Carp are seen feeding from a bottle at the Harbin Polarland Aquarium. (Diego Azubel/European Pressphoto Agency) #

A man swims in the freezing waters of the Songhua river during a winter swimming event organized duringf the 29th Harbin International Ice and Snow Festival in Harbin, China's northern Heilongjiang province, on Jan. 5. (Diego Azubel/European Pressphoto Agency #

A couple crosses the street before a mass wedding ceremony involving sixteen couples during the 29th Harbin International Ice and Snow Festival. (Diego Azubel/European Pressphoto Agency) #

A woman poses in front of a large snow sculpture of German composer Ludwig van Beethoven on display at the Sun Island Park during the 29th Harbin International Ice and Snow Festival in Harbin, China's northern Heilongjiang province, on Jan. 5. (Diego Azubel/European Pressphoto Agency) #

A man rides a toy tank for rent on the frozen Songhua river during the 29th Harbin International Ice and Snow Festival. (Diego Azubel/European Pressphoto Agency) #

A woman poses for a photograph in front of a large snow sculpture at the Sun Island Park during the 29th Harbin International Ice and Snow Festival. (Diego Azubel/European Pressphoto Agency) #

Fireworks go off behind a large ice sculpture during the opening ceremony of the 29th Harbin International Ice and Snow Festival in Harbin, China's northern Heilongjiang province, on Jan. 5. (Diego Azubel/European Pressphoto Agency) #

A man slides down an ice slide at the 29th Harbin International Ice and Snow Festival. (Diego Azubel/European Pressphoto Agency) #

Fireworks explode over ice sculptures during the official opening of the 29th Harbin International Ice and Snow Festival in Harbin in northeast China's Heilongjiang province on Jan. 5. (Associated Press) #