Countless grotesque faces stare out from this eerie Prague art wall.

A Jenga-style cylindrical tower of books that appears to go on forever.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

This charming candle shop has been in business since 1789.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

A mysterious dark-skinned Christ statue has been this town's religious center for centuries.

A huge, bustling local market in Panama City.

Right angles in the forests of Panama.

A pocket of jungle amidst urban expansion in Panama.

The now-quiet remains of coastal artillery defenses that were used in both World Wars.

A Neolithic burial tomb connected with a colorful array of legends.

One of the few surviving street funiculars in the world.

Go deep down into the earth to experience the world of Welsh coal miners.

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

A Welsh sheep farm provides daily (non-sheep) meals to red kites, producing dazzling displays of aerial acrobatics.

The longest and tallest aqueduct in Britain can actually be sailed across.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

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.