Northern Ireland's Brobdingnagian stepping stones.

A six-ton wedding present for the King of the Scots.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

One of the largest cat sanctuaries in North America is considered a "Club Med" for felines.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Art and a pun, all in one.

A slice of central Asia in the middle of Berlin.

This classic restaurant features a gorgeous mirror-clad room.

Started as a kitchen garden, now the second largest botanical garden in the world.

A beautiful but toxic fountain of mercury.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

A memorial to the beloved brown bear that served in the Polish army during World War II.

The silly symbol for an underground protest group is now scattered around the city.

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

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The traditional Polish croissant, folded 81 times into the shape of a horseshoe, is a legally protected cultural treat.