The final resting place of the poets Shelley and Keats.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Perhaps the most beautiful of preserved saints, with a little help from Paris.

Despite centuries of architectural innovation, this French castle is being built like it's the 13th century.