There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

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

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

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

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Crushed coral and crystals give the sand its signature coloration.

This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

More than 5,000 contemporary and "historic" mustards from around the world.

A stockpile of childhood lunch pails turned collectibles.

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

"X" marks the spot of an echo chamber in the middle of a plaza.

This quirky curiosity shop takes its cues from the world's bazaars.

New York's oldest magic store.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

This black shoreline is made up of exploded lava particles.

The home used in just a few seconds of film that came to define the setting of a hit sitcom.

Decommissioned NYC subway cars are dumped into the ocean to create this underwater wildlife habitat.