4 Riverside Nature Spots
Compared in Ubon Ratchathani

Pha Taem is the spot most locals recommend first if you want to understand why the Mekong riverside here is special. There are two draws layered on top of each other. The first is the ancient rock art, roughly three to four thousand years old, painted on the cliff face — figures of people, animals, handprints, and geometric patterns stretching for hundreds of meters. You can walk along the cliffside trail to see them up close. The second is the steep cliff view over the Mekong River, looking across to the Laos side, and because this is one of the easternmost points in the country, many people arrive before dawn to catch one of the first sunrises in Thailand.

From real reviews on Google and travel pages, visitors consistently praise how the morning cliff view is well worth the early wake-up, and the rock-art viewing path is well organized with explanatory signs to read along the way. The trade-off is that midday sun is harsh and the exposed rock flats get very hot, so it's best to go early morning or evening. If you're coming for sunrise, you'll need to leave town between 3 and 4 a.m. since the drive takes about an hour and a half. Compared with Sam Phan Bok, Pha Taem can be visited year-round with no need to wait for the dry season, but for the clearest skies and best sunrise photos, the cool season from around November to February gives the best results.

The entrance fee is the standard national park fee, cheaper for Thai nationals than for foreign visitors. Set aside half a day if you want to walk the full rock-art trail and hit several viewpoints. This spot is often paired with Saeng Chan Waterfall and Khong Chiam district in the same trip since they're in the same zone.

Sam Phan Bok is a vast rock plateau in the middle of the Mekong River, carved by the current into thousands of hollowed-out stone pools. The name Sam Phan Bok comes from the local word "bok," meaning basin or hollow. When the Mekong recedes in the dry season, the rock plateau emerges in full, creating a landscape rarely seen elsewhere in Thailand and often compared to the Grand Canyon. It features winding rock grooves, clear pools, and oddly shaped boulders that locals have given nicknames to, such as the "dog head rock." This spot is a paradise for photography lovers, thanks to countless camera angles and gorgeous morning and evening light hitting the stone.

The single most important thing to know is that Sam Phan Bok only looks its best in the dry season, roughly November to April, since the Mekong's water level needs to drop for the rock plateau to emerge. If you visit during the rainy season around the middle of the year, the rock flats will be completely submerged and invisible. This is the biggest limitation compared with Pha Taem and Khong Chiam, which can be visited year-round. Always check the water conditions with a local page or boat operator in the area before setting out.

Most visits to Sam Phan Bok involve taking a boat or a tram tour around the area, since the space is vast and walking it yourself under the sun would be exhausting and hot. Boat or tram fees run roughly a few hundred baht per person, or a set price if you charter the whole boat depending on group size. From real reviews, visitors praise the unusual landscape as well worth the trip, though some note that midday sun is very strong with no shade, so it's best to come early morning or in the evening to avoid the heat and catch better light.

Kaeng Tana is a national park located where the Mun River flows through a large stretch of rocky rapids before joining the Mekong. The highlight is the rocky rapids in the middle of the river, which, in the dry season, emerge as a wide stretch of exposed boulders, with a small island in the river and stretches of fast-flowing current. Another feature visitors love is the suspension bridge across the Mun River to Don Tana island — you can walk across it, and it's a popular photo spot. Overall the atmosphere here is shadier than Pha Taem and Sam Phan Bok thanks to more tree cover, making it a great fit for anyone who wants an easygoing nature experience without long walks or harsh sun exposure.

This is the most family-friendly choice of the four, since the paths aren't very steep and there are rest spots and a riverside picnic area, making it easier to bring kids and elderly family members than climbing a cliff or walking exposed rock flats under the sun. Many reviews praise how quiet and uncrowded it is compared with the other well-known spots, and how it's better suited to relaxing by the river than to dramatic photo opportunities.

As for seasons, Kaeng Tana is open year-round, but if you want to see the rapids clearly, it's best to visit during the dry season when water levels drop. In the rainy season, water levels rise and flow becomes strong, so be careful about safety and don't swim near the rapids. The entrance fee is the standard national park fee, cheaper for Thai nationals than foreign visitors. It's not far from Khong Chiam, so it's easy to pair both in the same trip.

Saeng Chan Waterfall, also known as the waterfall through the hole, is a small waterfall within Pha Taem National Park in Khong Chiam District. What sets it apart from typical waterfalls is that the water flows through a hole in the rock above before falling in a stream below. On days when sunlight passes through the gap in the rock at just the right angle, it creates a beam of light — which is how it got the name Saeng Chan Waterfall ("Moonlight Waterfall"). The waterfall itself isn't large, and it's a short walk from the parking area, making it ideal for anyone who doesn't want to climb or walk far. Timing matters though, since the waterfall looks its best with the most water during the rainy season, roughly July to October; in the dry season the flow may be low or dry up entirely.

Saeng Chan Waterfall is paired with Khong Chiam District because the two are in the same zone and are usually visited on the same trip. Khong Chiam is a small district on the Mekong riverside, right at the point where the Mun River flows in to meet it, creating the two-color river phenomenon — the muddy Mekong meeting the clear green Mun, visible as two distinct tones when the water is calm. The district has riverside restaurants, river-view accommodation, and piers where you can take a boat to view the scenery. The overall vibe here is a relaxed trip rather than an adventurous one, ideal for anyone who wants to unwind by the river and eat fresh river fish.

Compared with the top three spots, this one emphasizes comfort and atmosphere over grandeur. Saeng Chan Waterfall is small and dependent on the rainy season, but the advantage is that Khong Chiam district can be visited year-round and works well as a base for an overnight stay before heading up to Pha Taem the next morning for sunrise. Many people plan to stay one night in Khong Chiam and cover Pha Taem, Saeng Chan Waterfall, and the two-color river in a single trip.