A spiral staircase connects the limestone cave with Pembroke Castle, birthplace of King Henry VII.

Three bridges straddle a stream, one stacked upon the other.

A bit of retro transportation flair preserved in the world's largest department store.

Cryptic messages embedded in the New York City sidewalk.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

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.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This black church sits alone among a field of lava rock.

The oldest church in Iceland is one of the few to feature ornate decoration.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A tall karst islet popularized by 007.

This amazing mountain temple is topped by one of the tallest sitting Buddha statues in the world.

An ancient stone fortress considered by many to be the eighth wonder of the world.