Sam Phan Bok (Mekong Grand Canyon)

When the Mekong retreats in the dry season, Sam Phan Bok reveals thousands of potholes carved into honeycomb sandstone, some forming heart and animal shapes. Local boats shuttle visitors to sculpted terraces and photo spots, where sunrise and late afternoon light deepen the textures and shadows. Wear grippy footwear, carry water, and mind heat exposure from January to April. You can visit independently by car from Ubon Ratchathani city or join a day tour that also stops at riverside temples and viewpoints. Respect signage and avoid stepping on fragile edges. It’s a surreal, seasonal landscape that feels more Martian than tropical, and a striking addition to Lisa’s New Route that few first timers make time to see.