The Initiation Well, in the Regaleira Palace, is located in the town of Sintra. Looking like an upside down tower, where at every 15 steps a plateau is reached, in a total of nine leading to the depths of the earth. The nine plateaus remind the nine circles of Hell, the nine sections of Purgatory and the nine heavens of Paradise, as designated by Dante in Divine Comedy. It is believed that it was used in rituals of initiation into masonry, giving it’s name.
The Irish Sky Garden was designed by the american artist James Turrell, who main work concerned with light and space, to complement the rounded and pyramid-like shapes of natural landscape that surround this ancient Celtic High Fort. The most important thing is the experience, that inside turns into outside and the other way around, in the sense that relationships between the Irish landscape and sky changes.
The Monticello Dam, which holds back Lake Berryessa, features a morning glory spillway. This type of spillway is basically a giant cement funnel and is also known as The Glory Hole. Rather than spilling over the dam, high waters spill into the funnel. This is the largest in the world, with a diameter of 72 ft (22 m). It is used very rarely, but it is quite the sight to see it being put to use.
Étretat is a tourist and farming town situated about 32 km (20 mi) northeast of Le Havre, most known for its cliffs, including three natural arches and the pointed “needle”. Two of the three famous arches seen from the town are the Porte d’Aval, and the Porte d’Amont. The Manneporte is the third and the biggest one which cannot be seen from the town. These cliffs and the associated resort beach attracted artists including Eugène Boudina, Gustave Courbet and Claude Monet.
The Devetashka cave is also known as Maarata or Oknata for its seven different-sized holes in the ceiling, through which sunlight penetrates and illuminates the central hall and part of its two fields. The studies showed that the Devetashka cave used to be inhabited during almost every historical era. The earliest traces of human presence date back to the middle of the Early Stone Age before about 70,000 years BC.
Cenotes, or underground rivers, are naturally formed wonders created by the filtration of water through the limestone surface. They are sources of plentiful crystalline water and can be found only in the Yucatan Peninsula, Florida and the island of Cuba. The Mayans consider these ‘sinkholes’ sacred and gifted by the gods. In Chansinic’che cenote (“Tree with Small Ants”) the water is dark and very deep and cave formations are quite amazing as the giant roots of a tree growing right down into water.