Reykjadalur Hot River is one of South Iceland’s best-known natural geothermal bathing experiences, but choosing when to visit is not as simple as picking a month on the calendar. The most important factors are current weather, trail conditions, daylight and whether the route is open.
If you are planning your first visit, start with our full Reykjadalur Hot River guide, then use this article to decide when conditions are likely to suit your trip.
Some hot springs are mainly about soaking. Yunomine Onsen is also about pilgrimage, purification and place. Hidden in the mountains of Wakayama Prefecture, the small hot-spring settlement of Yunomine has been connected with the Kumano pilgrimage tradition for centuries. Its best-known bath, Tsuboyu, is a tiny stone-lined bath beside the creek in the centre of the village.
This alone makes this site memorable. What makes Yunomine unusual is how many different layers meet in one small place: geothermal water, religious history, the Kumano Kodo pilgrimage routes, traditional inns, a public hot-spring cooking basin and a bath closely associated with a UNESCO World Heritage cultural landscape.
If you are considering a visit, our full spring guide covers the practical details for Yunomine Onsen.
Kerosene Creek
Kerosene Creek is a naturally heated geothermal stream south of Rotorua on New Zealand’s North Island. Warm water flows through bush and over a small waterfall, creating one of the Rotorua region’s best-known unmanaged natural soaking places.
Unlike a commercial thermal pool, Kerosene Creek is not a staffed bathing complex. Rotorua’s official tourism organisation describes it as an unmanaged natural site with no lifeguards, while Rotorua Lakes Council says the land is privately owned within Kaingaroa Forest and public access is allowed. That combination makes the creek appealing, but it also means visitors need to take more responsibility for road conditions, water safety, belongings and the surrounding environment.
Yunomine Onsen
Yunomine Onsen is one of Japan’s most historically important hot-spring villages. Tucked into a narrow valley in the Kumano region of Wakayama Prefecture, it has been associated with geothermal bathing and the Kumano pilgrimage tradition for centuries.
The village is especially famous for Tsuboyu, a tiny stone-lined private bath beside the creek. Tsuboyu is closely connected with the UNESCO World Heritage-listed Sacred Sites and Pilgrimage Routes in the Kii Mountain Range. Official Wakayama tourism describes it as the only World Heritage site where visitors can enjoy full-body hot-spring bathing.
British Columbia has no shortage of geothermal water, but Radium Hot Springs and Liard River Hot Springs offer two very different ways to experience it.
Radium is a developed Parks Canada hot-springs facility in Kootenay National Park, with a large hot pool, a cooler swimming pool, change facilities and strong accessibility. Liard is a natural geothermal system in northern British Columbia, where visitors follow a boardwalk through boreal forest and warm-water wetland to soak in the Alpha Pool.
Both use naturally heated geothermal water. Both are public bathing destinations. But the experience, setting, temperature and style of travel are very different.
Liard River Hot Springs
Liard River Hot Springs is a natural geothermal spring system in northern British Columbia, set beside the Alaska Highway within Liard River Hot Springs Park. The springs are unusual not only because visitors can soak in naturally heated water, but because the geothermal outflow feeds an intricate warm-water wetland surrounded by boreal forest.
BC Parks describes Liard River Hot Springs as the second-largest hot spring in Canada and identifies the public bathing area as the Alpha Pool, where water temperatures range from approximately 42°C to 52°C / 108°F to 126°F.
Hot Springs Cove is one of British Columbia’s most distinctive natural hot-spring trips. Instead of driving to a roadside pool, visitors travel through Clayoquot Sound by boat or float plane, walk a 2 km boardwalk through coastal rainforest, and reach a series of natural geothermal pools beside the Pacific Ocean.
The destination is inside Nism̓aakqin Park on the west coast of Vancouver Island. The hot springs are known in ʕaḥuusʔatḥ culture as mux̣ʷšiƛa, meaning “steaming from rock”. This is a genuine natural hot spring rather than a commercial thermal pool, but its remote marine setting means planning matters. Tides, ocean swells, weather, transport arrangements, slippery boardwalk conditions, and park rules can all affect a visit.
For the full destination page, see Hot Springs Cove.
Radium Hot Springs
Radium Hot Springs is a natural mineral hot spring and developed bathing facility inside Kootenay National Park in British Columbia’s Canadian Rockies. Unlike a primitive wild spring, Radium combines naturally heated mineral water with a managed Parks Canada pool complex. Visitors soak in a large outdoor hot pool maintained at approximately 37°C to 40°C, with a separate cooler swimming pool available when operating conditions allow.
The setting beneath the steep walls of Sinclair Canyon gives Radium a strong mountain character while still offering changing rooms, lifeguards, lockers and accessible pool entry.
Hot Springs Cove
Hot Springs Cove is the familiar travel name for a natural geothermal soaking destination in Nism̓aakqin Park in Clayoquot Sound on the west coast of Vancouver Island, British Columbia. BC Parks identifies the springs by their ʕaḥuusʔatḥ (Ahousaht) name, mux̣ʷšiƛa (mahkw-shith-ah), meaning “steaming from rock”. The park itself was renamed from Maquinna Marine Park to Nism̓aakqin Park in 2025.
The springs are unusual because hot mineral water cascades through a rocky coastal setting into a series of natural pools that become progressively cooler as the geothermal water mixes with colder ocean water.
Buckeye Hot Springs
Buckeye Hot Springs is a natural geothermal spring area near Bridgeport in Mono County, California. The springs sit above Buckeye Creek in the Humboldt-Toiyabe National Forest, where very hot geothermal water flows from the hillside and mixes with cooler creek water around primitive soaking areas.
Unlike a commercial thermal pool, Buckeye is a rustic outdoor hot-spring experience. The creek, forest, mineral-stained rock and natural hot-water source are the main attraction, while road, weather and seasonal conditions can strongly affect access.
Australia’s Great Artesian Basin creates two very different kinds of warm-water experiences. One is natural: groundwater reaches the surface through springs, seeps, pools, and mound-spring systems that have existed for thousands or even millions of years. The other is developed: people drill into artesian aquifers, bring groundwater to the surface through a bore, and direct that water into a pool or bathing facility.
Both can involve naturally warm artesian groundwater. Both can be memorable places to visit. But they are not the same thing. That distinction matters when deciding whether a destination should be described as a natural hot spring, a mound spring, an artesian bore bath, or a developed thermal pool.
Dalhousie Springs
Dalhousie Springs is a remarkable natural mound-spring complex in Witjira National Park in the far north of South Australia. Fed by the Great Artesian Basin, the springs form a warm-water oasis within an otherwise dry and remote desert landscape.
The main spring is the best-known visitor bathing area. South Australia’s National Parks and Wildlife Service lists its water at around 37°C and permits swimming there, while the surrounding mound-spring system is protected for its natural, cultural and ecological importance. Dalhousie is not a constructed bore bath or commercial thermal spa. It is a natural artesian spring system where groundwater rises from considerable depth through cracks and fissures before reaching the surface.