Few visitors to Budapest are aware of the little church on the rock beneath Gellert Hill in Budapest Old Town. Despite being surrounded by so many grandiose churches, Sziklatemplom ('Rock Church') is relatively unknown. If you happen to be near the Liberty Bridge (the green metal one), you can visit this strange chapel founded in 1926 by a group of Pauline monks. The Cave Church (which is still in use) is not spectacular, but it is charming in its own right. Off the beaten path, but worth a 30-minute detour.