You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

These murals stand as reminders to the troubled history of this Northern Ireland city.

Northern Ireland's Brobdingnagian stepping stones.

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

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

This 18th century mansion played Winterfell in Game of Thrones.

A powerful statue sits on Scalestone Point, looking out over Morecambe Bay.

World's largest working waterwheel has been around for over 150 years.

This charming English house was once the home of England's most famous poet.

An ancient iron pillar in Delhi that seems to be rustproof.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

A perfect turquoise lake colored with glacier dust.

This charming stone church on the shore of Lake Tekapo is an icon in astrophotography.

The world's largest collection of ship figureheads includes figures from legends and history alike, from Sir Lancelot to Abraham Lincoln.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

The world's second-largest sundial, made entirely out of stone.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

A network of concealed passageways lies within a busy London Underground station.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."