Long before wi-fi, this public seat provided the wonder of being online while outdoors.

A strange and ancient landscape hides the dark, cavernous remains of a 5,000-year-old flint mine.

Built in 1911, the Tees Transporter Bridge is one of only six transporter bridges still in operation.

A massive Celtic cross secretly growing in an Irish forest.

This picturesque lighthouse at the edge of the Irish Sea looks like a giant stone pencil.

A whale's jawbone and a malfunctioning harpoon welcome you to the village of Bragar and its lore.

Spend the night in this formerly abandoned traditional Scottish village.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

These upturned herring boats make nifty storage sheds for fishing goods.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Originally intended as a temporary installation, this sculpture is now a permanent part of a stunning Scottish beach.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

This 1,300-year-old marker is one of the finest and most complete early Christian crosses in Scotland.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

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

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.