A naturally beautiful, seemingly bottomless deep blue spring.

Believed to be the only Orthodox church in the world that features a free-standing pulpit.

Monasteries on rock pillars, once accessible only by frayed ropes.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

The second-largest giant sequoia in the world.

A water tower shaped like a giant coffee pot looms over a small Swedish village in Central California.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

Nordic giants resurrected from the sea and restored to their former greatness.

This Danish park has celebrated the American independence day since 1912.

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

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

The northernmost point in Denmark is a turbulent sandbar created by two clashing seas.

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

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

Four alabaster giants contemplate the tides on the shore of Denmark.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

This unique architectural wonder is home to luxury apartments.

Denmark's famous pseudo-hill.

This historic black and white monastery is one of Bulgaria's architectural jewels.

A collection of art from Bulgaria's time as a communist state.