A collection of intricate sculptures so small they have to be seen through a microscope.

A two-way chairlift system between Zugliget and the highest point in the city.

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

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

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

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

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

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.