This house's itty bitty size means no humans allowed.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

An Orwellian sculpture with eyeball cameras watches passersby.

An eerily charming collection of salvaged buildings and curios grown out of a family scrap business.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

The smallest country in Australia is a principled little thing with a friendly emperor.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

Longest fortress system anywhere in Europe.

A self-proclaimed libertarian micro-state on a tiny bit of disputed territory between Serbia and Croatia.

When Croatia became independent of Yugoslavia, the splintering governments left behind these concrete tunnels.

A perfectly preserved hill village where the buildings are painted like white lace.

Too much gossip or just missing curfew could land you in here for a couple of days.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

The world's tallest bridge is also possibly the most elegant.

An Australian lake whose pink hue defies scientific explanation.

A swing to dangle you off the very edge.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.