The first and only troll museum in Norway has interactive exhibits, friendly staff and a small gift shop.

A preserved Nazi labor camp now has a Holocaust museum on site and memorials to the thousands that died while imprisoned at the camp.

Sip cherry liqueur at a bar dating back to 1840.

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

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This magnificent blue mosque in Afghanistan is surrounded by thousands of white doves.

This centuries-old tree tells an unusual tale of vegetation and fertility in the desert.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

Cemetery honors Americans who died during WWII and is the resting place of Gen. George S. Patton.

A striking 12th-century-style castle built on the edge of a cliff.

Brussels' favorite peeing boy has a sister.

Where members of the Crossbow Corps of San Marino demonstrate their skills.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

Hilltop monument to the victory of a new nation in the Franco-Prussian War.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

World's only telecommunication tower with a wooden pinnacle.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

This tremendous timepiece was once the largest cuckoo clock in the world.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.