The world's oldest bookshop still in operation.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

Elaborate tile work in this railway station tells the story of Portugal.

A small but charming botanical garden that contains many exotic plant species.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

A mural recalls a fictional woman who once lived at 23 Quai du Commerce, 1080 Brussels.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

Theme park featuring miniature replicas of European monuments.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

The Habsburgs' royal collections of art and wonders.

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

The world's largest frame offers spectacular views of the city's past and present.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

Ancient serpentine sacrifice holder that has stood the test of time.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

The ornate miniature mansions were built for Istanbul's feathered residents.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.