Most people who live or visit Japan are familiar with the neon green NTT pay phones scattered across the country. But there are a couple of special "duet phones" that allow two people to call a third person on one line.

This unique device commemorates 100 years of Nippon Telephone & Telegraph, and sits inside a charming tree-shaped structure that looks straight out of Animal Crossing. If you want to make a call, bring a friend and some coins or a telephone card.