Sip cherry liqueur at a bar dating back to 1840.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Picturesque intersection of witchcraft and ancient Christianity.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Human-made caves excavated to hide a secret society of wealthy pagans.

The oldest house in Glasgow is now a museum dedicated to the city's medieval history.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

The community pools that the community refused to give up on.

Obscure and obsolete publications are given new life as works of art.

This influential Renaissance-era library was once the haunt of kings and monks.

Enter this small nook and you'll be surrounded by 360 degrees of street art.