Some of the most visually stunning places on our planet also happen to be some of the most bizarre looking. While many may seem so strange that you’d think they were unnatural, these stunning but very real wonders simply prove just how amazing nature can be.

Marble Caves, Chile

Marble Caves, Chile (Nearby Hotels)

Mother Nature truly outdid herself with this one, though admittedly it took some 6,000 years of wave erosion to create the undulating patterns that give these spectacular caves their marbleized effect. Carved into the Patagonian Andes, the Cuevas de Marmol are located on a peninsula of solid marble that runs along Lake General Carrera, a remote glacial lake spanning Chile-Argentina border. When the waters are calm, kayakers can even paddle through the caves to get a closer look. The smooth, swirling shades of blues you’ll see on the walls of the cavern are a reflection of the lake’s azure waters, which can change in intensity and hue, depending on the time of year and water levels.

Giant’s Causeway, Northern Ireland

Giant’s Causeway, Northern Ireland, United Kingdom (Nearby Hotels)

One of Northern Ireland’s most popular tourist attractions, Giant’s Causeway in County Antrim earned its name from the 40,000 basalt columns that interlock to form what looks like Legos, or a walkway fit for a giant. While there are many legends and myths that have been told over the centuries as to how it was created, the Causeway was actually the result of a volcanic eruption that happened about 50 or 60 million years ago. Once the lava cooled it ended up taking its current shape. Today, the area is mostly owned and managed by the National Trust, and a popular World Heritage site found on many tour itineraries.

Socotra Island, Yemen

Socotra Island, Yemen (Nearby Hotels)

Described as “the most alien-looking place on earth,” Socotra Island is part of a remote archipelago in the Indian Ocean. It’s so isolated that one-third of its plant life is found nowhere else in the world, resulting in some especially bizarre flora. Most notable are its dragon’s blood trees, odd trees that look like flying saucers sitting atop trunks. They were given their name due to their red sap, which is traditionally used as a dye. The Dr. Seuss-like adenium socotranum trees look like elephants’ legs with pink flowers perched on them. Then, there are the birds like the Socotra grosbeak, Socotra sunbird and the Socotra starling that are found nowhere else on the planet. The island is actually inhabited by about 40,000 residents, and while there are two roads, there is no public transport. Visitors can fly in as the island has its own airport, and vehicles can be rented if required.

Red Seabeach, Panjin, China

Red Seabeach, Panjin, China (Nearby Hotels)

The world’s largest wetland area is renowned for its brilliant ruby-hued landscape, thanks to the crimson grasses of the marsh. The swath of marshy flora growing in shallow Dawa County, China waters is actually a plant that’s a rare form of Chenopodium, which is unique in that it can thrive in alkaline soil. This unusual landscape is home to thousands of birds, including a number of endangered birds, and features wooden walkways extending out over the delicate ecosystem allowing visitors to walk among these rare red reeds.

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Salar de Uyuni, Bolivia

Salar de Uyuni, Bolivia (Nearby Hotels)

When a prehistoric lake dried up about 30,000 years ago, it left an endless expanse of white hexagonal tiles that stretch to the horizon. Today, it’s considered to be the world’s largest salt flat, stretching for 4,000 square miles in Bolivia’s Andes Mountains, Salar de Uyuni provides more than 25,000 tons of salt per year to local miners, supports a thriving community of thousands of flamingos, and attracts tourists who can check into the Palacio de Sal, a 16-room hotel made entirely from salt blocks. The expanse of salt creates a seemingly never-ending white landscape during the dry season, but the area may be at its most breathtaking in the rainy season when covered with water and the reflection of the bright blue sky creates an even more surreal landscape. One of the best ways to experience it is to join one of the multi-day 4X4 tours that include other attractions in the surrounding desert, like geysers, rock formations, natural hot springs and colorful lakes that house hundreds of pink flamingos.

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Fairy Chimneys, Goreme, Turkey

Fairy Chimneys, Goreme, Turkey (Nearby Hotels)

Goreme was first built back in Roman times, constructed amid the unique rock formations that dominate the area. These towering structures on the high plateau of central Anatolia born of lava rise up to 130 feet into the sky, and over the years, they’ve been whittled down by erosion, creating strange mushroom-like structures that look like something out of a Salvador Dali dream. Since the fourth century AD, humans have been excavating these pillars to form dwellings, which now include boutique hotels. One of the best ways to see this surrealistic landscape is from above, which is why every morning just before sunrise, you’ll see hundreds of hot air balloons being fired up across the region before the float around and above the amazing fairy chimneys.

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Lencois Maranhenses

Lençois Maranhenses National Park, Maranhao, Brazil (Nearby Hotels)

Though not well known to most of the world, the remarkable desert oasis of Lencois Marahenses National Park in Maranhao, Brazil is one of the world’s truly spectacular, yet rather odd, natural wonders. Here, in the middle of the rolling white sand dunes, a magnificent transformation takes place during the rainy season each year as endless deep turquoise pools spread across the landscape. The pools come from the accumulation of rainfall, which peaks between July and September. By October, the desert begins to dry up once again, and the cycle starting anew. If you time it right, you can even swim in these tranquil, surprisingly warm pools that reach up to an idyllic 86 degrees Fahrenheit.

Caño Cristale

Cano Cristales River, Serranea de la Macarena National Park, Colombia (Nearby Hotels)

Visitors frequently make the journey into central Colombia’s Serranea de la Macarena National Park to see why the stunning Cano Cristales has inspired nicknames like the River of Five Colors, the Liquid Rainbow, and even the Most Beautiful River in the World. Originating in the Andean foothills of the Amazon rainforest, these titles can really only be claimed for a brief time each season, when the water reaches ideal levels between October and November each year, coming alive with colorful bottom-feeding algae. The kaleidoscope of pink, green, blue, and yellow is caused by a plant known as the Macarenia clavigera, which makes the river look as if it were a flowing rainbow of brilliant colors.

Wave Rock, Australia

Wave Rock, Hyden, Australia (Nearby Hotels)

One of the most unusual, and best known, landforms in Australia, this bizarre rock formation looks like a 46-foot-high cresting wave that will never break. As such, it offers a popular photo-op, where visitors like to assume a surfer pose to capture an ideal selfie. The granite cliff is located near the town of Hyden, about a four-hour drive east of Perth, and was formed by the erosion of softer material at the bottom of its ancient granite dome, while the vertical stripes are the result of rain washing chemicals down its face. While you’re in the area, you can also check out other unique rock formations like The Humps, Hippo’s Yawn and Mulka’s Cave as well as the wildlife park in Hyden, which hosts both rare white kangaroos and koalas.

Waitomo Caves, New Zealand

Waitomo Glowworm Caves, North Island, New Zealand (Nearby Hotels)

The Waitomo Caves are one of the most popular attractions in New Zealand, serving as a habitat for glowworms that can only be found in this country.  Visitors can float through this magical underground world on an inner tube, gliding down the dimly-lit waters with only the glow of the worms to light their way. If you go, you’re just about guaranteed to be mesmerized by the ceilings and walls that are lined with shimmering blue and green fairy lights. These truly magical caves formed more than 30 million years ago, beginning with the creation of limestone at the bottom of the ocean – standing today as one of the nation’s most inspiring natural wonders.