Xiaozhai Tiankeng Travel Guide: Explore the World’s Largest Karst Sinkhole

Intro & Tourist Map

Xiaozhai Tiankeng, located in Fengjie County, Chongqing, is the world’s largest and deepest karst sinkhole, known as the World’s First Pit). With a depth of 666.2 meters and a diameter of 622 meters, this geological marvel formed over millions of years due to underground river erosion and limestone collapse. Recognized as a UNESCO World Heritage Site, it offers breathtaking views of vertical cliffs, subterranean rivers, and rare ecosystems. Nearby attractions include Tianjingxia Ground Fissure and Han Kuimen (Dry Kuimen), adding to its allure for adventurers and nature lovers.

Essential Tips for Visitors

  • Altitude Awareness: Kanas Lake sits at 1,370 meters. Stay hydrated and avoid strenuous activity if prone to altitude sickness.
  • Pack Smart: Bring layers, waterproof gear, and sturdy shoes. Winters require heavy jackets.
  • Cash & Connectivity: Carry cash (CNY) for remote areas. Limited English is spoken; download a translation app.
  • Permits: Foreign travelers may need a Xinjiang Travel Permit – check requirements beforehand.
  • Eco-Friendly Travel: Respect nature; avoid littering or disturbing wildlife.

Transportation Options

By Air

 Fly to Chongqing Jiangbei International Airport, then take a 4.5-hour drive to Fengjie County.

By Train/Bus

Take a high-speed train to Wanzhou or Fengjie, then transfer to a bus to Xinglong Town (1.5 hours).

Weather & Best Time to Visit

    • Spring (March–May) and Autumn (September–November): Mild weather (15–25°C), ideal for hiking and photography.
    • Summer (June–August): Lush greenery but expect rain; prepare waterproof gear.
    • Winter (December–February): Cooler (5–10°C), fewer crowds, but trails may be slippery.

Recommended Itinerary

Duration: 1 full day.

  • Morning:
    • Start at the Visitor Center for maps and safety briefings.
    • Hike to the Tiankeng Rim (10 minutes via shuttle or walk). Marvel at the pit’s vastness and colorful rock layers.
    • Descend to the Bottom via steep trails (1–1.5 hours). Look for rare plants, waterfalls, and ancient fossils.
  • Afternoon:
    • Explore Tianjingxia Ground Fissure, a 14-km-long canyon with “one-sky” cliffs and hidden streams.
    • Visit Han Kuimen, a towering natural gateway resembling the Three Gorges.
  • Evening: Return to Xinglong Town for local cuisine like spicy Chongqing hotpot.

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