The greeting and meeting place is at traveller address like hotel's lobby floor and somewhere else
Spend your one day tour in and near Phnom Penh learning about the city's past and more recent history with a local driver who will also guide you from outside of the tourist attractions before going inside yourself. Explore museums, parks, monuments,

First, stop:
The most significant sites in Toul Genocide Museum:

“Tuol Sleng Genocide Museum is the memorial site of the S-21 interrogation and detention centre of the Khmer Rouge regime.

Located in the heart of Phnom Penh, it preserves evidence of a difficult period in Cambodian history with the aim of encouraging visitors to be messengers of peace. S-21 served as the central hub of a vast prison system throughout the country and was used throughout the period as a secret facility for the detention, interrogation, torture and extermination of those deemed “political enemies” of the regime. Very few inmates were released out of the prison during the years 1975 and 1979. Only 12 former inmates survived the opening of S-21 when Phnom Penh was liberated. Four of them were children.”

Part II of the tour is to continue to the Killing Field of Cheung Ek

Second, Killing Field is also well spoken by Khmer language as Cheung Ek genocide museum is located in Cheung Ek commune, Dankoar district, about 20 km from the centre of Phnom Penh. This is the location where the Khmer Rouge took their prisoners for execution.

Part III, after we are taking you back from the killing then we are continuing to have beautiful sunset boat tour with dinner included