This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

The statue honors an adventurous seafaring cat.

One of the world's steepest streets seems to have houses sliding down it.

One of New Zealand’s few castles boasts beautiful gardens, grand architecture, and a history filled with family drama.

The highway's southernmost spot is a beloved local attraction.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

This hulking behemoth is actually five interconnected towers built in the 1960s.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

Tour the original street level of Port Angeles, buried underground in 1914.

You'll find the little birds tucked within the rocks of this Australian beach.

This ordinary street was made infamous by a legendary visit from the devil.

This Transylvanian church has changed its denomination four times.

Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

The Natural History Museum that time forgot.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

Come for the flowers, stay for the bats!

The first mosque in the world to receive electricity.