Speedway stadium in Torun, Poland.

Club: KS Toruń - polish speedway team from Toruń, Poland. Formerly known as Apator Toruń (now oficial name is Unibax Toruń).

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Palace in Radomierzyce, Poland. Built in 1679-1732.

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The Sierra de Los Tuxtlas (Tuxtlas Mountains) are a volcanic belt along the southeastern Veracruz Gulf coast in southcentral Mexico. Peaks in this range include Volcano Santa Marta and Volcano San Martín, both rising above 1700 meters. San Martín is the only recently-active volcano in the belt, erupting in 1664 and again in May 1793. It is a broad alkaline shield volcano with a one kilometer wide summit. Hundreds of smaller cinder cones are prevalent throughout the Sierra.

Other, extinct volcanoes include San Martin Pajapan (1,160 meters) and Cerro El Vigia (800 meters).

The Sierra de Los Tuxtlas volcanoes are an insular anomaly. The volcanoes are separated from the nearest volcano in the Trans-Mexican Volcanic Belt to the west by about 150 miles (250 km), and from the Central American Volcanic Belt to the southeast by almost 200 miles (330 km).

El Chichón is an active volcano in northwestern Chiapas, Mexico. Its only recorded eruptive activity was in March-April 1982, when it produced a one km-wide caldera that then filled with an acidic crater lake. The eruption killed around 2,000 people who lived near the volcano. It had high-sulphur anhydrite-bearing magma, explosive eruptions, pyroclastic flows, and surges that were devastating.

In 2000, the lake's water temperature increased. Also, the lake acquired a blue-green color, due to massive amounts of dissolved minerals in the acidic water, and fine, light-colored ashy sediment continually stirred up by boiling areas.

[Source: Wikipedia]

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Former military base in Gora Kalwaria, Poland.

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Crossroad (interstate roads no 95 and 295) under construction, Florida, USA.

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The ruins are located on 39-ft (12-m) cliffs, along the east coast of the Yucatán Peninsula on the Caribbean Sea in the state of Quintana Roo, Mexico. One of the best-preserved coastal Maya sites, Tulum is today a popular site for tourists.

The Maya site may have been formerly also known by the name Zama, meaning city of Dawn. Tulúm is also the Yucatec Mayan word for fence or wall (or trench), and the walls surrounding the site allowed the Tulum fort to serve as a defense against invasion. From the numerous depictions in murals and other works around the site, Tulum appears to have been an important site for the worship of the Diving or Descending God.

While an inscription dated A.D. 564 has been found at the site, most of the structures now visible were built in the Post-Classic Era, between about 1200 and 1450. The city remained occupied through the early years of the Spanish conquest of Yucatán, but was abandoned by the end of the 16th century. Local Maya continued to visit the temples, to burn incense and pray, until the late 20th century, when tourists visiting the site became too numerous for the local inhabitants.

Photo: Columns in the form of Toltec warriors in Tula

Tula is a town of 28,432 (2005 census) in the southwestern part of the state of Hidalgo in central Mexico, some 100 km to the north-northwest of Mexico City. The modern town is known as Tula de Allende; also a state municipality that covers part of the southeastern portion of the Pre-Columbian city. The present-day municipality has a population of 93,296 and an areal extent of 305.8 km² (118.07 sq mi), which includes numerous smaller outlying towns, the largest of which are El Llano, San Marcos, and San Miguel Vindho.

Nearby are the remains of the ancient capital city of the Toltecs, also known as "Tula" or as "Tollan". Usually identified as the Toltec capital around 980 CE, the city was destroyed at some time between 1168 or 1179.

The site is at and around the junction of two rivers, the Río Rosas and the Río Tula. The two largest clusters of grand ceremonial architecture are nicknamed "Tula Grande" (the most visited by tourists) and "Tula Chico". Remains of other buildings extend for some distance in all directions. In the residential areas streets were laid out in a grid pattern.