The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

A terrific purveyor of natural history objects and curios.

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

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

Largest lake in Great Britain measured by surface area.

The heads of two giant mythological water horses honor Scotland's horselord past.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

Ancient cliffs resembling a kilt on Scotland’s second-largest island emit an entrancing sound.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

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

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

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

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 taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

These tiny effigies are believed to represent victims of Edinburgh’s notorious Anatomy Murders.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

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