underground cave

Quan La Communal House in Xuan La (Tay Ho, Hanoi) has a cave gate leading down to a mysterious large underground cellar with many anecdotes such as the Han tomb's grave, Dan Sa

These unique sculptures show the infinite creativity and imagination of people.

Around the beginning of the 16th century, the invaders from Spain were the ones who discovered Kukulkan temple in Mexico's Chichen Itza ruins.

The underground cave system on Mars and Moon can be a safe haven for people in the future.

In recent weeks, underground caves have been constantly exposed on the streets, swallowing cars, buses, even large trucks, and killing at least 1 person.