The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

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

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

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

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

Romania's triumphal arch looks out over Bucharest.

A statue honors the children who fought Nazis in Poland.

2300-year-old Roman road connecting the empire.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

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

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

An alchemist's "magic door" stands in the middle of a Roman park.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

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

The fairy tale castle of the "fairy-tale king."

A small but immensely extravagant palace built by the "Night King."

Explore the complex ecology of this multifaceted nature preserve by riverboat.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

Thousands of well-dressed mummies below a monastery.

The world's most active stratovolcano is almost always erupting.

142 ceramic steps become a mosaic once a year.