The first excavations on Obi Island, northeast Wallacea, reveal three phases of occupation beginning in the terminal Pleistocene. Ground shell artefacts appear at the end of the terminal Pleistocene, the earliest examples in Wallacea. In the subsequent early Holocene occupation phase, ground stone axe flakes appear, which are again the earliest examples in Wallacea. Ground axes were likely instrumental to subsistence in Obi's dense tropical forest. From~8000 BP there was a hiatus lasting several millennia, perhaps because increased precipitation and forest density made the sites inhospitable. The site was reoccupied in the Metal Age, with this third phase including quadrangular ground stone artefacts, as well as pottery and pigs; reflecting Austronesian influences. Greater connectivity at this time is also indicated by an Oliva shell bead tradition that occurs in southern Wallacea and an exotic obsidian artefact. The emergence of ground axes on Obi is an independent example of a broader pattern of intensification at the Pleistocene-Holocene transition in Wallacea and New Guinea, evincing human innovation in response to rapid environmental change.

People of Yogyakarta have an indigenous knowledge about catastrophe that is starting to be abandoned, due to the development of science and technology. Catastrophe events are considered more accurate when examined in a technological perspective, even thought technology has not been able to explain the meaning and philosophy of indigenous communities. The purpose of this research is; (a) identify traces of ancient catastrophe in Yogyakarta based on a philoarchaeological perspectiveand (b) analyze the relationship between the emergence of natural disaster folklore and the potential of natural disasters.The method of data collection is done online. The data were analyzed with a philoarchaeological approach. The results of this study show that ancient catastrophe consists of earthquakes, tsunamis, mountain eruptions, and floods. There is a link between the emergence of folklore and natural disasters. Folklore Ratu Kidul, Labuhan, and Merti Desa are related to earthquakes and tsunamis. Folklore Mbah Petruk, Labuhan, and Merti Desa are related to mountain eruptions.

Prambanan Temple contains local wisdom values that have not been well informed to domestic visitors. This article aims to introduce Arloka Map, an alternative communication media in a form of physical tour-map containing local wisdom values of the Prambanan Temple Area and to test the effectiveness rate of the Arloka-Map. Observation, literature studies, and instrument test methods were used to collect basic data. To determine the success rate of the proposed strategy, pre- and post-tests were conducted to 50 domestic tourist respondents. The outcomes were then analyzed by using the SPSS application. Results showed that score for visitors that were using the Arloka-Map was higher than visitors who did not use it (i.e. 8.72 vs 4.44). It was concluded that the use of the Arloka-Map assist tourists to know the values of local wisdoms at the temple’s area.