Tourists explore the narrow and dark caves of Tràng An Scenic Landscape Complex near Ninh Binh, a World Heritage site in Vietnam.<br /><br />In the claustrophobic footage, a woman is seen navigating her tour boat through the cave, using only two paddles and squeezing through small gaps in the rock. <br /><br />Filmed in January 2020, the tour takes around two hours and opens out into an area of spectacular natural beauty.
