Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

Huge winged monument in the United Kingdom.

The artwork is tucked within a cave on a tiny Scottish island only accessible at low tide.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

One man spent 10 years building a spectacular section of road because no one else would.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The heads of two giant mythological water horses honor Scotland's horselord past.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

The most loyal of little dogs, or a Victorian era publicity stunt?

Semi-precious Blue John stones have been mined in this cavern system for centuries.

A hunk of prehistoric lava rests amid the Gothic architecture of a campus quad.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

What do we know about the real woman behind one of the Beatles' most famous songs?

The quiet field that inspired one of the most famous songs of all time.

A striking 500-year-old mansion provides an unexpectedly sublime home for live deer and a menagerie of exotic stuffed animals.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.