Its called living heaven in the earth.
If u go from chennai . you ahve bus and trains available daily several service . so acceablity is not an issue to reach tirupathi to tirumalai.
Even AP government have buses to reached to tirumalai from tirupathi. Cost of bus imticket is 48/per head.
Sight seeing palces.
1.Pathmavathi amaravathi temple, alamelumangapuram
2.iskon temple
3.sri kalyana venkateswara sami temple
4.sri varahasami temple
5.sri govindarajasami temple
6.kapila tirtham
7.shree vari mettu
8.deer park
9.talakona waterfalls
10.agasa gangai
11.paapanasam tirtham.
Etc.
Hotels and accomodation.
There arw several hotel available in tirupathi. not only private . Temple rooms are also available ranges from 100 to 5000 rupees.
Tirupathi nd tirumalai are fully survallianced by police and camera more than any state of india. so no need to worry about safety.
Thank u