The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

A series of stained glass artworks that depict images of the hit TV show.

A museum marks and documents the site of the Titanic's launch.

These barriers stand as stark reminders of Northern Ireland's troubled past.

These engineering masterpieces are a dominant feature of the Belfast skyline.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

The highest peak in Utah is the hardest to reach, but only if explorers choose the hard way.

The oldest city park in Walla Walla is home to hundreds of birds, from wood ducks to white peacocks.

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Inside this Krakow church, an explosion of psychedelic color.

This man-made mound monument was built out of soil from all across the Polish empire.

The final resting place of the most famous sharpshooter.

In this relatively flat state the highest point is an honored place.

The highest point in Indiana is curated by an Eagle scout but may be in danger of losing its record to a nearby garbage pile.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

A monument to the King's final show, complete with a time capsule.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.