Musical road

In Japan. there are roads that play music as cars travel over them. Grooves (沟) are carefully cut into the surface of the road The spaces between the grooves make different music as cars touch them. The closer the groves are, the louder the music will be..

Bicycle in the tree

On Vashon Island, Washington, a bike is seen high up in a tree. The bike is not hanging on a branch (树枝) 一it is fixed in the tree and the tree has continued growing upwards. The tree grows around the bike instead of pushing it over, making it part of its growth.

Underground city

In Cappadocia, Turkey, a man knocked down a wall of his home and discovered a huge underground city. It has many tunnels (隧道), rooms and wells. Thousands of shafts (通风井) bring air to even the deepest levels. The city is huge enough for 200 people and their animals to live in.