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The Archaeological Survey of India carried out restoration work on the temple between 1986 and 1992. Since the 1990s, Angkor Wat has seen continued conservation efforts and a massive increase in tourism. The temple is part of the Angkor World Heritage Site, established in 1992, which has provided some funding and has encouraged the Cambodian government to protect the site. The German Apsara Conservation Project (GACP) is working to protect the devatas and other bas-reliefs which decorate the temple from damage. The organisation's survey found that around 20% of the devatas were in very poor condition, mainly because of natural erosion and deterioration of the stone but in part also due to earlier restoration efforts.[51] Other work involves the repair of collapsed sections of the structure, and prevention of further collapse: the west facade of the upper level, for example, has been buttressed by scaffolding since 2002, while a Japanese team completed restoration of the north library of the outer enclosure in 2005.[53] World Monuments Fund began conservation work on the Churning of the Sea of Milk Gallery in 2008 after several years of conditions studies. The project restored the traditional Khmer roofing system and removed cement used in earlier restoration attempts that had resulted in salts entering the structure behind the bas-relief, discoloring and damaging the sculpted surfaces. The main phase of work ended in 2012, and the final component will be the installation of finials on the roof of the gallery in 2013.
Microbial biofilms have been found degrading sandstone at Angkor Wat, Preah Khan, and the Bayon and West Prasat in Angkor. The dehydration and radiation resistant filamentous cyanobacteria can produce organic acids that degrade the stone. A dark filamentous fungus was found in internal and external Preah Khan samples, while the alga Trentepohlia was found only in samples taken from external, pink-stained stone at Preah Khan.[54]
Angkor Wat has become a major tourist destination. In 2004 and 2005, government figures suggest that, respectively, 561,000 and 677,000 foreign visitors arrived in Siem Reap province, approximately 50% of all foreign tourists in Cambodia for both years.[55] The site has been managed by the private SOKIMEX group since 1990, which rented it from the Cambodian government. The influx of tourists has so far caused relatively little damage, other than some graffiti; ropes and wooden steps have been introduced to protect the bas-reliefs and floors, respectively. Tourism has also provided some additional funds for maintenance—as of 2000 approximately 28% of ticket revenues across the whole Angkor site was spent on the temples—although most work is carried out by foreign government-sponsored teams rather than by the Cambodian authorities.
Since Angkor Wat has seen significant growth in tourism throughout the years UNESCO and its International Co-ordinating Committee for the Safeguarding and Development of the Historic Site of Angkor (ICC), in association with representatives from the Royal Government and APSARA, organized seminars to discuss the concept of "cultural tourism".[57] Wanting to avoid commercial and mass tourism, the seminars emphasized the importance of providing high quality accommodation and services in order for the Cambodian government to benefit economically, while also incorporating the richness of Cambodian culture. In 2001, this incentive resulted in the concept of the "Angkor Tourist City" which would be developed with regard to traditional Khmer architecture, contain leisure and tourist facilities, and provide luxurious hotels capable of accommodating large amounts of tourists.