Þjórsárdalur Valley in Iceland
Þjórsárdalur (Thjorsardalur) Valley is a flourishing green oasis set against the stark, volcanic backdrop of the Icelandic Highlands.
Often overlooked on Golden Circle tours, it’s a rewarding detour that brings together nature, culture, and living history in one compact area. Here, you’ll find beautiful waterfalls, ancient lava fields, and even a meticulously reconstructed Viking-era farmstead. For an unforgettable experience that puts you in touch with Iceland’s untouched beauty, Þjórsárdalur Valley won’t disappoint.
Why Visit Þjórsárdalur Valley?
• Some of Iceland’s tallest waterfalls, including Háifoss and Granni
• A rare green oasis on the edge of the Icelandic Highlands
• Ancient lava fields shaped by volcano Hekla and the Þjórsá lava flow
• Viking history at Þjóðveldisbærinn Stöng
• Filming locations from the final scene of Stranger Things
Natural Attractions of Þjórsárdalur Valley
Winding along the vast river Þjórsá, Þjórsárdalur is packed with lush, highland-edge scenery. Uncover mossy lava landscapes, dramatic gorges, basalt columns, and even some of South Iceland’s highest waterfalls.
Afterward, witness these same powerful forces explained in detail at Perlan’s Forces of Nature exhibition in Reykjavík.
Þjórsá
The valley winds along Iceland’s longest river: Þjórsá. Rising from the glacier Hofsjökull high in the Icelandic Highlands, this colossal waterway extends 143 miles (230 kilometers) long.
Surging with a milky-gray glacial torrent, the river Þjórsá serves as the main artery of the region. Over time, it has shaped Þjórsárdalur Valley. It carved deep gorges and valleys, while also providing the energy harnessed by the Búrfellsvirkjun hydroelectric power station.
Háifoss and Granni Waterfalls
Háifoss, or the "Tall Waterfall," is one of the most spectacular natural sites in Þjórsárdalur Valley. At roughly 122 meters high, it ranks among the tallest waterfalls in the country, plunging into a steep, moss-covered gorge below. Just beside it flows Granni (“Neighbor”), a smaller but striking companion waterfall.
Both waterfalls are fed by the river Fossá, a tributary of the Þjórsá. Surrounding viewpoints allow visitors to appreciate the sheer scale of the gorge. More adventurous hikers may follow rugged, unmarked paths for closer perspectives, best attempted with caution and good conditions.
Hjálparfoss
Hjálparfoss (“The Helping Falls”) is one of the valley’s most picturesque cascades. It stands out for its unique double cascade, where two separate streams merge and tumble into a calm pool below.
Historically, this waterfall served as a life-saving resting place for travelers crossing the barren Sprengisandur highland route. It offers weary horses and riders their first sign of greenery and fresh water after days of traversing the desolate Icelandic Highlands.
Þjórsárhraun (Þjórsá Lava)
Much of the Þjórsárdalur landscape is shaped by Þjórsárhraun (Þjórsá Lava), the largest lava flow in Iceland. It originated from a massive eruption in the Bárðarbunga–Veidivötn volcanic system thousands of years ago. Later additions from nearby volcanoes, including Mount Hekla, further influenced the surrounding terrain.
This vast, black lava field covers an estimated 375 square miles (970 square kilometers). The mighty river Þjórsá slices through its hardened flow.
Þjórsárdals Hot Springs
The Þjórsárdals hot springs are small, undeveloped pockets of geothermal warmth scattered across the Þjórsárdalur valley floor. Fed by naturally heated groundwater, these warm seeps often mingle with colder runoff from the surrounding landscape.
These warm spots create sheltered microclimates where thriving species of wildflowers, grass, and moss take root. It’s best appreciated as part of Þjórsárdalur’s quiet, unspoiled wilderness rather than as traditional hot-spring bathing sites.
Gjáin
Tucked away within the valley, Gjáin is a secluded gorge often described as a fairy-tale landscape. This remarkable natural oasis is filled with countless small waterfalls that tumble into clear, emerald pools, nurturing a rich ecosystem. The gorge is lush with moss, grasses, and wildflowers, making it a favorite spot for photographers and hikers.
‘Stranger Things’ in the Valley
Since the bittersweet finale of Stranger Things, attention has surged online for the real-world landscapes that appeared in the show. In particular, the dreamy waterfalls of Þjórsárdalur (a significant plot detail) showed up in all its serene, alien beauty. The emotional final scene was filmed against the gorge’s enchanting cascades with the lush green landscape sweeping in the background.
This newfound pop-culture buzz has helped put Þjórsárdalur Valley on the bucket lists of nature lovers and Stranger Things fans. It’s perfect for travelers eager to explore landscapes that feel otherworldly yet grounded in real wilderness.
Historical and Cultural Sites in the Valley
The historical landscape of Þjórsárdalur valley is a story of resilience, with human history repeatedly interrupted by volcanic fury. These cultural spots offer a wonderful opportunity to connect with Iceland's past and present.
Þjóðveldisbærinn Stöng
One of the most tangible connections to Iceland’s past can be found at Þjóðveldisbærinn Stöng, a carefully reconstructed Viking-era farmstead. The original settlement of Stöng was buried beneath ash and pumice during the massive 1104 eruption of the volcano Hekla. It preserved a snapshot of life during the Icelandic Commonwealth period.
Today, the faithful reconstruction offers an immersive glimpse into the daily lives of early settlers. It’s also a reminder of the ever-present volcanic threat faced by those living in this fertile yet volatile landscape.
For a broader context on Iceland’s volcanic forces, visitors can complement their journey with a stop at Perlan in Reykjavík. The museum’s immersive Volcano Show explores how eruptions like Hekla’s have shaped the island’s history and environment.
Búrfellsvirkjun
In sharp contrast to the ancient farmstead of Stöng is Búrfellsvirkjun, one of Iceland's largest and most significant power plants. This massive hydroelectric power station harnesses the tremendous flow of the river Þjórsá, converting it into renewable geothermal energy.
Located strategically near Þjórsárdalur Valley, this power station near Þjórsárdalur is a landmark of modern Icelandic engineering. It reflects the country's long-standing commitment to sustainable energy, transforming the river’s immense volume into electricity.
Búrfell Woods
The area surrounding Búrfell mountain offers a variety of recreational opportunities for visitors to Þjórsárdalur Valley. Its lower slopes are home to the Búrfell woods, a surprisingly large forest created through decades of intensive planting. Scenic hiking trails and sheltered picnic spots make this wooded area a rare and welcome contrast to Iceland’s otherwise treeless landscape.
How to Get to Þjórsárdalur Valley?
Þjórsárdalur Valley is easily accessible and makes an excellent extension of the classic Golden Circle route. The most convenient way to reach the valley is by car from Reykjavík. Expect driving time of approximately 1.5 to 2 hours under normal conditions.
From Route 1 (Ring Road), turn onto Road 30 and continue onto Road 32, the main access route through Þjórsárdalur. Road 32 connects many of the valley’s key sights, including Stöng, Gjáin, and Hjálparfoss. While some side roads and viewpoints are reached via gravel tracks, most are accessible to two-wheel-drive vehicles during the summer months. Access roads to Háifoss, however, are rougher and may require caution or a higher-clearance vehicle.
To fully appreciate the natural sites and historical highlights, plan to spend a full day exploring at a relaxed pace.
What Is the Best Time to Visit Þjórsárdalur Valley?
The ideal time to visit Þjórsárdalur Valley is during the summer months, from June through August. During this period, the weather is generally milder, and the valley’s lush greenery is at its most striking. Summer also brings improved access, with key roads leading deeper into the Icelandic Highlands and to remote viewpoints typically open.
While the valley is accessible year-round, winter travel can be challenging due to snow, ice, and limited daylight. Access to certain sites, such as the Háifoss viewpoints, may be restricted or unsafe. Visitors are advised to always check current road and weather conditions before setting out, particularly outside the peak summer season.
A Scenic Detour You Can’t Miss in Iceland
Þjórsárdalur Valley showcases a side of Iceland that deepens any appreciation for the country’s dramatic character. Just beyond the familiar Golden Circle, this accessible detour leads into a vivid oasis of volcanic contrasts. It is a sublime scene: one of Iceland’s tallest waterfalls, lush greenery, and the fairy-tale tranquility of Gjáin.
Gain a deeper understanding of the geological forces that shaped landscapes like Þjórsárdalur. Visit the Perlan Museum to experience engaging insights into Iceland’s natural wonders.
FAQs About Þjórsárdalur Valley
How long to spend in Þjórsárdalur Valley?
Allow at least half a day. However, a full day is ideal to comfortably explore the valley’s highlights, including its waterfalls and the historic site of Stöng.
Is Gjain worth it?
Definitely. Gjáin is often described as a hidden oasis and is one of the most beautiful natural sites in the valley.
How do you get to Gjain?
Gjáin is reached via a clearly signed detour off Road 32. A small parking area marks the entrance, followed by a short but steep walk down into the gorge.
Is Þjórsárdalur Valley part of the Golden Circle?
No, Þjórsárdalur Valley lies just east of the main Golden Circle route. It is considered an excellent detour, easily accessed via Road 30 and Road 32.
Is there an entrance fee to the valley attractions?
No. Most natural attractions in Þjórsárdalur Valley are free to visit and open to the public.
Was Stranger Things filmed in Þjórsárdalur Valley?
Yes. The final scene of Stranger Things was filmed in Þjórsárdalur Valley. The area’s lush gorge and waterfalls provided the otherworldly landscape seen in the show’s closing moments.
