Nimbachala Narasimha Swami Temple is considered as the second temple in India (first being Badrinath) where Swayambhu Nara - Narayana (dual form of Lord Vishnu) are worshipped. Hence this is also called as "Dakshina Badrinath". The Lord here is seen in a sitting posture with His consort Sri Maha Laxmi sitting on His left lap. You can also see the idols of Krishna-Arjuna (many say that Nara-Narayana is the form of Lord Krishna and Arjuna), Lord Hanuman, Garuda and Sri Madhwacharya besides the main idol in the sanctum sanctorum.
The Utsava Murthi on which all the rituals are performed is in the temple town of Bheemgal in its Angadi Bazaar (old market place). During Brahmotsavam, this deity is taken for procession in a Palanquin from the temple in the market to the hill temple. Try to visit the temple in Kartika Maasam (in the month of Kartika, generally after Diwali) where the Lord is adorned with
Image Courtesy: www.samasya.com/.../andhra/nimbadri/index.html