Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The most loyal of little dogs, or a Victorian era publicity stunt?

The final resting place of soldiers' loyal canine companions.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

A six-ton wedding present for the King of the Scots.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

Protecting the dead from opportunistic body snatchers.

A sweet symbol marks the place where torturous executions were once carried out.

360° views of the city plus five floors of optical illusions and hands-on science.

Follow the original medieval paths that wind through this intriguing section of the city.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Artists and musicians now rule over this former rail station.

A historic house left in "dramatic still life."

Scattered throughout London are ancient remnants of the city's former bounding wall.

A hands-off space for graffiti artists to hone and display their skills.

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