With so much beautiful things on the surface, have you ever imagined what underground wonders lie beneath? Believe it or not, there are some amazing sights underground. Humanity has been burrowing, digging, and constructing impressive architectural feats for centuries.
Here are 10 most amazing underground wonders in the world.
1. Turda Salt Mines
Turda Salt Mines is in Turda, Romania. It was first excavated in the 17th century, and has been transformed into many things, such as a cheese factory and a bunker during WWII.
Now it is an underground theme park. Along with rides, you can find mini-golf and ping pong tables.