A shaft of light through the dome of the Pantheon, UNESCO World Heritage Site, Rome, Lazio, Italy, Europe

Castellana caves (Castellana Grotte), Apulia, Italy, Europe

Elevator inside Old Town City Hall at Old Town Square, Old Town, Prague, Czech Republic (Czechia), Europe

Elevator inside Old Town City Hall at Old Town Square, Old Town, Prague, Czechia, Europe

Big Ben concept shot of time flying. London, England, United Kingdom, Europe

River Evenlode at dawn, UK

Sunset on Isla Danzante in the Gulf of California (Sea of Cortez), Baja California Sur, Mexico.

Kikuchi Ravine, Kumamoto Prefecture

Hoshi-Toge, Niigata Prefecture

Light installation at the Shaft tower of former Goettelborn open-cast mine, Europe's tallest shaft-tower, Saarland, Germany, Europe

Consolidation Coal Mine Industrial Complex with a light installation, Gelsenkirchen, Ruhr district, North Rhine-Westphalia, Germany, Europe

Glowing balloon on the grounds of the Zeche Zollverein mine, part of the Schachtzeichen art project of the Kulturhaupstadt-Jahr Ruhr2010 Capital of Culture-year, 311 yellow balloons mark former mine shafts, Oberhausen, Ruhrgebiet area, North Rhine-Westpha

Hammerhead tower of the former Erin colliery, Castrop-Rauxel, Ruhr Area, North Rhine-Westphalia, Germany, Europe

Art installation by the Raumlaborberlin, Soap Opera, many hundreds illuminated balloons at a mine shaft, GlueckAuf2010 cultural festival at the start of the European Capital of Culture year, on the site of the Zeche Zollverein mine and coking plant, Essen

Art installation by the Raumlaborberlin, Soap Opera, many hundreds illuminated balloons at a mine shaft, GlueckAuf2010 cultural festival at the start of the European Capital of Culture year, on the site of the Zeche Zollverein mine and coking plant, Essen

Art installation by the Raumlaborberlin, Soap Opera, many hundreds illuminated balloons at a mine shaft, GlueckAuf2010 cultural festival at the start of the European Capital of Culture year, on the site of the Zeche Zollverein mine and coking plant, Essen

Final event of Ruhr2010, capital of culture year, former mine Zeche Nordstern is illuminated as a ship, live show, Gelsenkirchen, North Rhine-Westphalia, Germany, Europe

Art installation by the Raumlaborberlin, Soap Opera, many hundreds illuminated balloons at a mine shaft, GlueckAuf2010 cultural festival at the start of the European Capital of Culture year, on the site of the Zeche Zollverein mine and coking plant, Essen

Art installation by the Raumlaborberlin, Soap Opera, many hundreds illuminated balloons at a mine shaft, GlueckAuf2010 cultural festival at the start of the European Capital of Culture year, on the site of the Zeche Zollverein mine and coking plant, Essen

Final event of Ruhr2010, capital of culture year, former mine Zeche Nordstern is illuminated as a ship, live show, Gelsenkirchen, North Rhine-Westphalia, Germany, Europe

Final event of Ruhr2010, capital of culture year, former mine Zeche Nordstern is illuminated as a ship, live show, Gelsenkirchen, North Rhine-Westphalia, Germany, Europe

Illuminated shaft tower, mining museum, Oelsnitz in the Erzgebirge mountains, Saxony, Germany, Europe

Cave explorer forces his way up through a narrowing in the rock in a cave high in the White Mountains on the island of Crete.