Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Asia's largest limestone cave is home to a world of plastic goblins and gold mining history.

About as hidden as can be, this specialty coffee shop is wedged between multi-story buildings at the end of a dark, skinny alleyway in Seoul.

This fountain was once heralded as the largest in the world.

Salute the leader of the proletariat.

The oldest living tree in Manhattan comes shrouded in sinister legend.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

Once America's longest-manned military fort, now an abandoned hulk.

A celebration of capitalism in Midtown.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Triangular House built on a leafy residential street in St. Paul.

The oldest continually used church in Minneapolis also sells great meat pies.

Elaborate drama imparts an appreciation for 19th century hardships.

Duluth mineral magnates built this charming art deco lodge to be their private clubhouse.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.