Travertine fountain sculpted by Filippo Brigioni in 1727, Nepi, Viterbo, Lazio, Italy, Europe

Town Hall and Travertine fountain sculpted by Filippo Brigioni in 1727, Nepi, Viterbo, Lazio, Italy, Europe

Town Hall and Travertine fountain sculpted by Filippo Brigioni in 1727, Nepi, Viterbo, Lazio, Italy, Europe

Erupting Pohutu Geyser with rainbow, sinter terraces, Te Puia, Whakarewarewa, Rotorua, Bay of Plenty, New Zealand, Oceania

Fontana del Tritone, by Gian Lorenzo Bernini, in travertine, 1642 - 1643, Piazza Barberini, Rome, Italy, Europe

Chiostro Maggiore di San Francesco, cloister of the church St Francis, built in 1565 - 1623 in travertine, Ascoli Piceno, Marches, Italy, Europe

Chiostro Maggiore di San Francesco, cloister of the church St Francis, built in 1565 - 1623 in travertine, with a well in its center, Ascoli Piceno, Marches, Italy, Europe