World Welcomes 2015: See the Most Spectacular Celebrations Around the Globe

Even North Korea had a blast as 2015 dawned.

— -- Happy new year!

In the United States, an estimated 1 million people packed Time Square in New York to ring in 2015.

"Best day of my life apart from the day we got married," Christopher Crawford told ABC News station WABC. He and his wife Chelsea traveled to New York from Paisley, Scotland, and kissed when the clock struck midnight.

"There are no words for it," said Chelsea Crawford. "It's fantastic."

Fireworks exploded over the Strip in Las Vegas.

In Toronto, revelers packed Nathan Phillips Square.

Thousands gathered in Copacabana beach in Rio de Janeiro.

Fireworks lit up London, Paris, Moscow, and Istanbul.

Berlin's light show and fireworks focused on Brandenburg Gate, and were accompanied by Welsh opera singer Katherine Jenkins.

Of course, in a city that last year set the Guinness World Record for world's largest firework display, there were plenty of pyrotechnics, too.

Hong Kong, Taiwan, Sydney, and New Zealand got early starts.

ABC News' Michael S. James and Linzie Janis contributed to this report.