The beautiful baroque library of the Hapsburg empire.

The final resting place for the remains of 143 Habsburg royalty.

An exquisite Baroque church in Vienna's old town.

Baroque celebration of the end of the Great Plague of Vienna.

The solemn exterior conceals an opulent interior of this 17th century church.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

This basilica is dedicated to two saints, one of which is known more for his famous quote.

Ancient ruins hidden underneath a modern luxury hotel.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The final resting place of the poets Shelley and Keats.

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

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Macabre astrological automaton clock dating to the late 1400s.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.