This Danish castle is supposedly haunted by a woman too independent to not be a witch.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

This museum is a portal to 20th-century Denmark.

An exhibition of preserved locomotives housed in a 1950s depot shows the history of Denmark's railway.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

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

In legend, this ancient dolmen was said to have been created when a troll tried to destroy a church.

Preserved "bog person" that is over 2,000 years old.

Iron Age "bog person" preserved for over 2,300 years.

This quiet bird sanctuary on the Danish coast is home to something not usually found in a conservation area: hunters' cabins.

These old World War II fortifications have been transformed into an unusual equine attraction.

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

A small Denmark town displays a pair of titanic jaw bones as their community symbol.

A public display of random paleontology.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The largest flower auction house in the world.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

A failed attempt to control drifting sands yielded a gnarled sylvan wonderland.

This historic orchard contains Northern Europe's largest collection of paradise apple trees.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

Tiring of digging out the door to this church for every service, it was eventually abandoned to the sands.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.