746-88412 - The rock-hewn churches of Lalibela in Ethiopia. Pilgrim praying in front of a church. The churches of Lalibela have been constructed in the 12th or 13th century. They have been hewn from the solid rock and are considered to be one of the largest monolithic structures ever build by mankind, Africa, East Africa, Ethiopia, Lalibela
832-125614 - Glasses with contaminated soil samples from old industrial sites, Altlast Zinkstrasse, New Ruhr Museum, Zollverein Coal Mine Industrial Complex, Essen, North Rhine-Westphalia, Germany, Europe
857-67575 - Orvieto, Umbria, Italy, during a late spring sunset. Orvieto is noted for its Gothic cathedral, or duomo. The church is striped in white travertine and greenish-black basalt in narrow bands; its design has often been attributed to Arnolfo di Cambio, but the prevailing modern opinion is that its master mason was an obscure monk named Fra' Bevignate from Perugia; construction began in 1290.