1. Richat Structure, Mauritania
The Richat Structure, also known as the Eye of the Sahara and Guelb er Richat, is a prominent circular feature in the Sahara desert near Ouadane, west–central Mauritania. This structure is a deeply eroded, slightly elliptical, 40 km in diameter dome. The sedimentary rock exposed in this dome ranges in age from Late Proterozoic within the center of the dome to Ordovician sandstonearound its edges. The sedimentary rocks comprising this structure dip outward at 10°–20°. Differential erosion of resistant layers ofquartzite has created high-relief circular cuestas. Its center consists of a siliceous breccia covering an area that is at least 30 km in diameter. Initially thought as a meteorite impact structure, it is now thought to be merely an uplift laid bare due to erosion. Though, no conclusive studies exist.
2. Eternal Flame Falls, Orchard Park, New York
The Eternal Flame Falls is a small waterfall located in the Shale Creek Preserve, a section of Chestnut Ridge Park in Western New York. A small grotto at the waterfall’s base emits natural gas, which can be lit to produce a small flame. This flame is visible nearly year round, although it can be extinguished and must occasionally be re-lit.
3.Reed Flute Cave, Guangxi, China
The Reed Flute Cave is a landmark and tourist attraction in Guilin, Guangxi, China. It is a natural limestone cave with multicolored lighting and has been one of Guilin’s most interesting attractions for over 1200 years. It is over 180 million years old. The cave got its name from the type of reed growing outside, which can be made into melodious flutes. Reed Flute Cave is filled with a large number of stalactites, stalagmites and rock formations in weird and wonderful shapes. Inside, there are more than 70 inscriptions written in ink, which can be dated back as far as 792 AD in the Tang Dynasty. These aged inscriptions tell us that it has been an attraction in Guilin since ancient times.
4. Upper Kanarra Falls, Kanarraville, Utah
It is a perfectly multi-hued, twisting-and-turning-slot canyon. It was formed due to the flowing water bodies and subaerial processes.
5.Antelope Canyon, Arizona
Antelope Canyon is a slot canyon in the American Southwest. It is located on Navajo land east of Page, Arizona. Antelope Canyon includes two separate, photogenic slot canyon sections, referred to individually as Upper Antelope Canyon or The Crack; and Antelope Canyon or The Corkscrew.The Navajo name for Upper Antelope Canyon is Tsé bighánílíní, which means “the place where water runs through rocks.” Lower Antelope Canyon is Hazdistazí (advertised as “Hasdestwazi” by the Navajo Parks and Recreation Department), or “spiral rock arches.” Both are located within the LeChee Chapter of the Navajo Nation.
6.Fly Geyser, Nevada
Fly Geyser, also known as Fly Ranch Geyser is a man-made small geothermal geyser located in Washoe County, Nevada approximately 20 miles (32 km) north of Gerlach. Fly Geyser is located near the edge of Fly Reservoir and is only about 5 feet (1.5 m) high, by 12 feet (3.7 m) wide, counting the mound on which it sits.
7. Salar de Uyuni, Bolivia
Salar de Uyuni, amid the Andes in southwest Bolivia, is the world’s largest salt flat. It’s the legacy of a prehistoric lake that went dry, leaving behind a desertlike, 11,000-sq.-km. landscape of bright-white salt, rock formations and cacti-studded islands. Its otherworldly expanse can be observed from central Incahuasi Island. Though wildlife is rare in this unique ecosystem, it does harbor many pink flamingos.
8. Fingal’s Cave, Scotland
Fingal’s Cave is a sea cave on the uninhabited island of Staffa, in the Inner Hebrides of Scotland, known for its natural acoustics. The National Trust for Scotland owns the cave as part of a National Nature Reserve. Fingal’s Cave is formed entirely from hexagonally jointed basalt columns within a Paleocene lava flow,similar in structure to the Giant’s Causeway in Northern Ireland and those of nearby Ulva.
9.Zhangye Danxia Landform, China
The Danxia landform refers to various landscapes found in southeast, southwest and northwest China that “consist of a red bed characterized by steep cliffs”.It is a unique type of petrographic geomorphology found inChina. Danxia landform is formed from red-coloured sandstones and conglomerates of largely Cretaceous age. The landforms look very much like karst topography that forms in areas underlain by limestones, but since the rocks that form danxia are sandstones and conglomerates, they have been called “pseudo-karst” landforms.
10. Door To Hell, Turkmenistan
The Door to Hell (also known as the Gates to Hell, the Crater of Fire, Darvaza Crater) is a natural gas field in Derweze,Turkmenistan, that collapsed into an underground cavern in 1971, becoming a natural gas crater. Geologists set it on fire to prevent the spread of deadly methane gas, and it has been burning continuously since then. The diameter of the crater is 69 m, and its depth is 30 m.