The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A giant Troll lurks under one of Seattle's oldest bridges.

A walk through the historic city center, under the streets of Seattle.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

The decorations were inspired by an unlikely missing treasure.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

This playground sculpture of an icon from the past is dedicated to the children of the future.

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

A giant milk bottle from the 1930s beckons drivers to this diner.

A cluster of headless, armless sculptures looms within a popular Polish park.

An impressive monument to Poland's independence.

These mechanical goats first battled it out in the year 1551, all because of an overcooked deer.

A towering monument to war, located on a beautifully peaceful hill.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

The embalmed remains of the communist leader lie within a custom crystal coffin.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This classic restaurant features a gorgeous mirror-clad room.

Carved fountains poignantly placed in parks and in front of special monuments.

A fearsome dragon clings to a corner of Munich's city hall.

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Daily jousts and dancing barrel makers in Munich's mechanical clock.