In events reminiscent of the plot of an Indiana Jones adventure, two researchers believe the discovery of a historic diary may be the key to finding New Zealand's mysterious Pink and White Terraces - the fabled 'eighth wonder of the world.' Made up of large mounds of silica deposits, the terraces were once a feature of the Lake Rotomahana region until a massive volcanic eruption at Mount Tarawera in 1886 purportedly changed the area's landscape forever. Now, the discovery of a field diary belonging to Swiss geologist Ferdinand von Hochstetter may provide a way to uncover the pink hued springs that were once renowned among indigenous people for their healing qualities. A new paper by researchers Rex Bunn and Dr Sascha Nolden details how the Swiss geologist's 1859 etchings of the area has helped them "plot the lost terrace locations." Von Hochstetter's diary was discovered by Nolden in 2010 and contains survey drawings for Lake Rotomahana that pre-date the Mount Tarawera eruption. https