One of Hungary's most influential places of learning is also home to one of the world's most beautiful libraries.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

A hidden three-foot-wide house separates these two regal churches.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

A cluster of granite granaries perched on stilts.

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

A majestic hotel for dreamers rises from the center of a fairytale wood.

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