Nature Bank

Ik Kil is a well known cenote outside Piste in the Municipality of Tinum, Yucatan, Mexico, It is located in the northern center of the Yucatan Peninsula and is part of the Ik Kil Archeological Park near Chichen Itza. It is open to the public for swimming and is often included in bus tours. The cenote is open to the sky with the water level about 26 metres  below ground level. There is a carved stairway down to a swimming platform. The cenote is about 60 metres  in diameter and about 40 metres  deep.  Source

Baja California Sur "Lower California South", officially Free and Sovereign State of Baja California Sur, is the second smallest Mexican state by population and the 31st admitted state of the 31 states which, with the Federal District, make up the 32 Federal Entities of Mexico. Before becoming a state on October 8, 1974, the area was known as the South Territory of Baja California. It has an area of 73,475 km² , or 3.57% of the land mass of Mexico and occupies the southern half of the Baja California peninsula, south of the 28th parallel. It is bordered to the north by the state of Baja California, to the west by the Pacific Ocean, and to the east by the Gulf of California, also known as the "Sea of Cortés". Also, the state has maritime borders with Sonora and Sinaloa to the east across the Gulf of California. As of 2010, the population was 637,026. The state is home to the tourist resorts of Cabo San Lucas and San Jose del Cabo. Its largest city and capital is La Paz, a tourist resort and historic landmark. It includes Loreto, the historic first capital of all three Californias, and the town of Santa Rosalia which is the site of a historic church designed by Gustave Eiffel.  Source

Chichen Itza was a large pre-Columbian city built by the Maya people of the Post Classic. The archaeological site is located in the municipality of Tinum, in the Mexican state of Yucatan. The Yucatan Peninsula is a limestone plain, with no rivers or streams. The region is pockmarked with natural sinkholes, called cenotes, which expose the water table to the surface. One of the most impressive of these is the Cenote Sagrado, which is 60 metres  in diameter, and sheer cliffs that drop to the water table some 27 metres  below. The Cenote Sagrado was a place of pilgrimage for ancient Maya people who, according to ethnohistoric sources, would conduct sacrifices during times of drought. Archaeological investigations support this as thousands of objects have been removed from the bottom of the cenote, including material such as gold, carved jade, copal, pottery, flint, obsidian, shell, wood, rubber, cloth, as well as skeletons of children and men.  Source

Cabo San Lucas  commonly called Cabo, is a city at the southern tip of the Baja California peninsula, in the Mexican state of Baja California Sur. Cabo San Lucas together with San Jose del Cabo is known as Los Cabos. As of 2010, the city had a population of 68,463. Cabo has been rated as one of Mexico's top 5 tourist destinations;  it is known for its beaches, scuba diving locations, balnearios, the sea arch El Arco de Cabo San Lucas, and marine life. The Los Cabos Corridor has become a heavily trafficked holiday destination for tourists, with numerous resorts and timeshares along the coast between Cabo San Lucas and San Jose Del Cabo. Archaeological excavations have shown evidence of continual human habitation in the area for at least ten thousand years.  When the first Europeans arrived, they encountered the Pericu people, who survived on a subsistence diet based on hunting and the gathering of seeds, roots, shellfish, and other marine resources.  Source