As being right now in Phnom Penh, I have found on YouTube this video on Phnom Penh and the places worth a visit.
Phnom Penh, the Capital City of Cambodia.
Some important places and monuments in Phnom Penh:
A small hill crowned by an active wat (pagoda) marks the legendary founding place of the Phnom Penh. The hill is the site of constant activity, with a steady stream of the faithful trekking to the vihear, shrines and fortune tellers on top, and a constellation of vendors, visitors and motodups at the bottom. Elephant rides available. The legend of the founding of Wat Phnom is tied to the beginnings of Phnom Penh. Legend has it that in 1372 Lady Penh (Yea Penh) fished a floating Koki tree out of the river. Inside the tree were four Buddha statues. She built a hill ('phnom' means 'hill') and a small temple (wat) at what is now the site of what is now known as Wat Phnom. Later, the surrounding area became known after the hill (Phnom) and its creator (Penh), hence 'Phnom Penh.' The current temple was last rebuilt in 1926. The large stupa contains the remains of King Ponhea Yat (1405-1467) who moved the Khmer capital from Angkor to Phnom Penh in 1422. Look for the altar of Lady Penh between the large stupa and the vihear. She is said to be of particular help to women.
The distinctive rust-red National Museum next to the Royal Palace was dedicated by King Sisowath in 1920. Over 5000 objects are on display including Angkorian era statues, lingas and other artifacts, most notably the legendary statue of the 'Leper King.' Though the emphasis is on Angkorian artifacts, there is also a good collection of pieces from later periods, including a special exhibition of post-Angkorian Buddha figures. Visiting the museum after rather than before a trip to the Angkor Archaeological Park in Siem Reap helps lend context to the Angkorian artifacts. Multi-lingual tour guides are available. Souvenirs and books available. Photography is limited. The museum borders Street 178, aka 'Artist's Street' which is lined with local art galleries and souvenir shops. The Reyum Gallery on Street 178 is of particular note, exhibiting the works of contemporary Cambodian artists.
(At the intersection of Norodom and Sihanouk)
The Independence Monument (Vimean Ekareach) was inaugurated in November 9, 1962 to celebrate Cambodia's independence from foreign rule. Renowned Cambodian architect, Vann Molyvann was the architect of the monument. The Independence Monument now also serves as a monument to Cambodia's war dead. It is the site of colorful celebrations and services on holidays such as Independence Day and Constitution Day.