This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

This giant wooden treehouse within a sprawling garden has its own eatery.

Northern Ireland's Brobdingnagian stepping stones.

This stone harbor was key to Carnlough's limestone industry.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

An island made out of shells, including a cemetery.

West Africa's largest fishing port honors its artisanal fishing process.

This giant statue is the product of a mixture of corruption, Stalinist architecture, and North Korean manpower.

This unique religious structure is an architectural gem with arresting ocean views.

This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

The fairy tale castle of the "fairy-tale king."

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A beautiful maze marks where three countries meet.

The highest point in Belgium is a staircase to nowhere.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

A contemporary art installation housed within a Gothic cathedral.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

Fantastic views and thousands of love locks.

Haven for Cape Fur Seals, until the Ring of Death of jumping Great White Sharks arrives.