These are the places around Bangalore where you can explore and be back to the city within a day. I have personally visited each of this place and its not someone sitting behind a computer and doing research to put a blog post. Do leave a comment if you need any more information about the place or if I have missed any place.

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Place	Image	Distance from Bangalore (km)	Tags
Swamimalai hills, Yelagiri		160	Trek, Temple, View
Devarayana Durga		70	Temple, View
Ganalu Waterfalls		100	View, Waterfalls, Cauvery
Ramadevarabetta		65	Trek, Temple, View
Mandaragiri		60	Lake, Hike, Jain Temple
Shivagange		50	Trek, Temple, View
Bilikal Rangaswamy Betta		70	View
Horsely Hills		155	View
Himavad Gopalaswamy Betta		215	View, Temple, Western Ghats
Nagarhole National Park		220	Safari, Nilgiri Biosphere Reserve, National Park, Tiger Reserve, Western Ghats
Bandipur National Park		210	Safari, Nilgiri Biosphere Reserve, National Park, Tiger Reserve, Western Ghats
Biligiriranga Hills		200	Tiger Reserve, Western Ghats, Temple, Wildlife Sanctuary
Sri Someshwara Temple, Kolar		65	Temple
Antargange		65	Temple, Hike, Cave
Kolaramma Temple		65	Temple
Bugga Ramalingeswara Swamy Temple, Tadipatri		265	Temple
Sri Venugopala Swamy Temple, KRS backwaters		170	Temple
Chintala Venkataramana Swamy Temple, Tadipatri		265	Temple
Gaganachukki Waterfalls		125	Waterfalls
Hogenakkal Waterfalls		125	Waterfalls
Vainu Bappu Observatory		170	Observatory
Gommateshwara Temple, Shravanabelagola		145	Jain Temple