As per your request below I am providing you the list of top tourist place located in Nepal. Please check the below list of tourist palaces:

The list includes:

KATHMANDU CITY
PASHUPATINATH
Dakshinkali
Boudanath
Swayambhunath
BHAKTAPUR
Nagarkot
Dhulikhel
Patan

There are many other place to visit which are:

Kathmandu Darwar Square
Sleeping Bishnu
Ason Bazar
Kopan Monasteries;kopan-monastery.comKopan Monastery - Kopan Monastery, Kathmandu Nepal
Pahrping Monasteries
Daksin Kali Temple
Orphans schools in Kathmandu
Nepal National Museum
Freak street
New road (Cheapest place to buy electronics goods)
Chitwan National Park Jungle safari
Pokhara Valley

List of tour operators in Nepal:

Adarsha Nepal Adventure Tours and Travels
Chaksibari Marga - 619

Nepal Tour Operator
Nepal, Kathmandu

Travel Agency
Thamel Marg

Rhino Travel Agency
Chaksibari Marg

Friendship Nepal Tours & Travels
Amrit Marg

Nepal One Tours & Travels Pvt. Ltd.
Thamel Marg

Nepal Trekking Agency
Kushlechaur Marg

Angel Tours Trekking Operator
Thamel Road

Society of Travel and Tour Operators Nepal
Amrit Marg

Access Nepal Travels & Tours Pvt. Ltd. (Branch Office)
Thamel, near Kathmandu Guest House,, Just opposite of Pilgrims Book House, 3rd floor

Nepal Trailblazer Trekking
Balaju Roundabout

Holiday Adventure Nepal
Z Street