The medieval network of canals hidden underneath the city is opened to explorers each year.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

This Kyoto Starbucks takes coffee drinkers back in time.

This 700-year-old street food market features baby octopus and soy donuts.

The grave of Mary Nasson is shrouded by witchy legends.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

It took years to decode its mysterious messages.