"A Gothic-style cathedral that unexpectedly houses a golden chalice archaeologists believe may be the actual Holy Grail; visitors can explore ornate side chapels and take audio-guided tours that reveal its historic and spiritual significance within the city’s expansive old town." - Rachel Chang Rachel Chang Rachel Chang is a travel and pop culture journalist who contributes to Travel + Leisure, Condé Nast Traveler, Lonely Planet, and more. Travel + Leisure Editorial Guidelines