Unlike other cities in the area, Page was founded in 1957 as a housing community for workers and their families during the construction of nearby Glen Canyon Dam on the Colorado River. Its 17-square-mile (44 km2) site was obtained in a land exchange with the Navajo Nation. The city is perched atop Manson Mesa at an elevation of 4,300 feet (1,300 m) above sea level and 600 feet (180 m) above Lake Powell.

After the dam was completed in the 1960s, and was officially incorporated (March 1, 1975), the city grew steadily to today's population of over 9,000. Because of the new roads and bridge built for use during construction, it has become the gateway to the Glen Canyon National Recreation Area and Lake Powell, attracting more than 3 million visitors per year. Page is also the home of two of the largest electrical generation units in the western United States. Glen Canyon Dam has a 1,288,000-kilowatt capacity when fully online. The other power plant to the southeast is the Navajo Generating Station, a coal-fired steam plant with an output capability of 2,250,000 kilowatts.

Antelope Canyon is on Navajo land east of Page, Arizona. (I went to see this natural wonder in 2017).
Antelope Canyon was formed by erosion of Navajo Sandstone, primarily due to flash flooding and secondarily due to other sub-aerial processes. Rainwater, especially during monsoon season, runs into the extensive basin above the slot canyon sections, picking up speed and sand as it rushes into the narrow passageways. Over time the passageways eroded away, making the corridors deeper and smoothing hard edges in such a way as to form characteristic "flowing" shapes in the rock.
Flooding in the canyon still occurs. A flood occurred on October 30, 2006, that lasted 36 hours, and caused the Tribal Park Authorities to close Lower Antelope Canyon for five months.
Antelope Canyon is a popular location for photographers and sightseers, and a source of tourism business for the Navajo Nation. It has been accessible by tour only since 1997, when the Navajo Tribe made it a Navajo Tribal Park. All visits are through one of several licensed tour operators. It is not possible to visit the Canyon independently.
Photography within the canyons is difficult due to the wide exposure range made by light reflecting off the canyon walls. My tour guide was extremely knowledgeable and was very helpfull to adjust my camera for taking some unbelievable nice shots of the Canyon.
Antelope Canyon is visited exclusively through guided tours, in part because rains during monsoon season can quickly flood the canyon. Rain does not have to fall on or near the Antelope Canyon slots for flash floods to whip through, as rain falling dozens of miles away upstream of the canyons can funnel into them with little prior notice.
On August 12, 1997, eleven tourists, including seven from France, one from the United Kingdom, one from Sweden and two from the United States, were killed in Lower Antelope Canyon by a flash flood.
Resources: Wikipedia

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