A miniature train-ride through Slovenia's largest cave system.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

Biblical beasts and endangered animal preservation come together in this Israeli zoo.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

Southern Italy's spinning top village.

100 year tradition of fist fights, marked by marble footsteps.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Elevated freight railway turned wildly successful urban park.

A monument to the 17,000 Chinese who worked and died to build Canada's Pacific Railway.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

One of the largest underground systems runs under Canada's largest urban center.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

This massive, ancient stone was disassembled and then put back together again.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.