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Travertine rock formations build up over time from the dripping and evaporation of mineral laden water. Eventually the travertine forms into stalactites and shallow caves. Tonto Natural Bridge is believed to be the largest natural travertine bridge in the world. It stands over a 400-foot-long tunnel that is 150 feet wide and 183 feet high. The volume of rock in the bridge is estimated to be 200 million cubic feet. The bridge is the result of water laden with calcium carbonate from perennial springs that have dripped for thousands of years. The natural bridge was discovered by Scotsman David Gowan in 1877. Gowan persuaded his family to emigrate and move to the location where they built a lodge in 1927. They lived there until 1948 when the land and building were sold to Pine native Glen Randall. In 1967 Randall’s widow sold the property and eventually it became a State Park. The lodge is still standing and is now on the National Register of Historic Places. Tonto Natural Bridge State Park is near Pine, Arizona, USA.
Under Todra Gorge, Morocco - between rocks
Tonto National Forest near Payson Arizona
Various valleys and gullies of water at the bottom of Lake Cerkniška in Slovenia. The lake thus dries up and flows into underground rivers approximately every 50 years.
High angle view rocky formation with holes at la buitera canyon, a striking natural volcanic environment located in patagonia, lagnuineo department, chubut province, argentina
View of the waterfall from the cave inside in Valencia, Spain.
Image of Gorgeous textured stone arch with gold hue on underside of bridge abstract background asset
Lava Tubes are collapsing around the Queen's Bath area of Hawaii.
Young Adventurous Caucasian Boy sitting up against the Sandstone wall of a cave at Truitjieskraal in the Cederberg Wilderness Area South Africa
Red iron oxide rock formations at Cians gorges, Regional Nature Reserve, Southern France
Tonto National Forest near Payson Arizona
panoramic view of a massive Salt Mine Cave in Garmsar of Iran
Inside Tonto Natural Bridge in the mountains of Arizona looking out from behind a waterfall.
Natural cave at Cala Luna, a famous tourist destination in Dorgali municipality. Province of Nuoro. Sardinia. Italy.
Arch Cave below Tonto Natural Bridge AZ in Payson, Arizona, United States
Daglı sinkhole, Kastamonu, Turkey
Natural bridge in Tonto Bridge State Park in Arizona
Ponza, Latina, Lazio, Italy, Europe:\nThe Natural Arch of Ponza
Natural Rock Pile at Tonto Natural Bridge State Park . High quality photo
Travertine rock formations build up over time from the dripping and evaporation of mineral laden water. Eventually the travertine forms into stalactites and shallow caves. Tonto Natural Bridge is believed to be the largest natural travertine bridge in the world. It stands over a 400-foot-long tunnel that is 150 feet wide and 183 feet high. The volume of rock in the bridge is estimated to be 200 million cubic feet. The bridge is the result of water laden with calcium carbonate from perennial springs that have dripped for thousands of years. The natural bridge was discovered by Scotsman David Gowan in 1877. Gowan persuaded his family to emigrate and move to the location where they built a lodge in 1927. They lived there until 1948 when the land and building were sold to Pine native Glen Randall. In 1967 Randall’s widow sold the property and eventually it became a State Park. The lodge is still standing and is now on the National Register of Historic Places. Tonto Natural Bridge State Park is near Pine, Arizona, USA.
Hole in the rock on the side of a hill
Montezuma Well unit of Montezuma Castle National Monument
North Kaibab Trail views of the geology and vegetation of this natural wonder.
A large rock archway with a blue sky in the background. The archway is dark and the sky is light blue
Lake Cave interior with stalactites and stalacmites, South Western Australia.
View of natural rock bridge Imi-n-Ifri near village Demnate, Morocco on the foothills of High Atlas Mountains looking similar to the silhouette of the African continent.
Stone and soil background
Imi-n-Ifri Natural Bridge in Morroco by the Demnate town
View through rocks  into sky in landscape in Phitsanulok province  around village Parangmee near Noen Maprang in Phitsanulok province
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