The heart of a Scottish legend had a centuries-long journey before reaching its final resting place.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A contemporary fresco movement illustrates the region's rich history.

Astonishing rock formations dot the Brimham Moor landscape.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

This ancient Spanish castle sits high upon a hilltop.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Eastern Canada's ocean playground.

This historic cemetery stopped accepting bodies before many Canadian cities were founded.

How would you like to dine in the same room where some of the Titanic's victims were embalmed?

These crude contraptions were used to aid in the mining of lead, silver and gold.

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

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

A perfectly running 230-year-old silver automaton and music box.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

Mountain where Jesus was first tempted by the Devil.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

A century-old tradition has culminated in a small but singular collection of feline effigies.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

A wellspring of creativity in an already artsy East London neighborhood.

A celebrated bandstand at the center of what was once the worst slum in London.