The 9 tiers are locally referred to as 'Nine Steps of Love' based on a regional legend regarding local courtship customs.
The waterfall's structure is unique because the limestone formation allows for stable, shallow wading pools at almost every level.
The water temperature remains relatively cool throughout the year due to the dense forest canopy covering the stream's source.
The site acts as a transitional geographical point between the limestone mountains of Ninh Bình and the mountainous terrain of Thanh Hóa.
Thác Mây, or Cloud Waterfall, is a cascading natural landmark in Thạch Lâm, Thạch Thành, characterized by a series of 9 consecutive tiers of limestone steps. The waterfall originates from the Trường Sơn range, creating a multi-level flow that forms numerous shallow, natural swimming pools along the mountainside. Its unique tiered structure is formed by mineral-rich water depositing limestone layers over centuries, resulting in a gentle, staggered descent rather than a single vertical drop. The site is situated within the protected buffer zone of the Cúc Phương National Park ecosystem, preserving significant karst forest biodiversity. Visitors can navigate the levels via stone-like terraced paths carved by the water's consistent flow.
The view from the base of the third tier looking upward, which captures the rhythmic stacking of the limestone levels.
Wear water-ready footwear with a firm grip, as the limestone rocks become extremely slick when wet.
Bring a waterproof bag for electronics, as the spray from the multiple tiers can be pervasive.
Visit during the morning hours to avoid the peak arrival times of local weekend excursion groups.
Do not attempt to climb the rock faces outside of the designated terraced paths to prevent erosion and personal injury.
Best avoided during the peak monsoon season (June to August) due to flash flood risks and murky water quality.
Dress modestly; while swimming is allowed, keep swimwear contained to the pool areas and avoid walking through local villages in beach attire.
