Austria’s oldest brewery makes beer with flaming-hot granite.

Nearly 40 miles and 1,000 years of limestone mines under Denmark.

Six beautiful wooden giants are hidden around Copenhagen.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

The mansion-like building is packed with Texas pride.

The final home of the legendary Danish sailor said to have lived to be 146 years old.

Remnants of the Nazis' occupation of Denmark linger along the sand.

The patron saint of spinsters grasps a container of dried blood.

This historic streetcar system has been running since the 19th-century.

Elaborate tile work in this railway station tells the story of Portugal.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

A chance to follow in the footsteps of the word's most legendary animator.

This small, but long-running hobby club has built one of the largest model rail lines in the US.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

The subtle science of a master molecular gastronomist.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

This lucky bronze frog was gifted to Madrid by a casino.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

This postmodern apartment block was designed to be a vertical neighborhood.