A museum and gardens with unusual plants and a history of progressive programming for the blind.

Huge winged monument in the United Kingdom.

A lone pole once used to display a man's corpse now stands empty, but the memory remains.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

The sign at the garden gate reads: "These Plants Can Kill."

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

A million and a half tons of earth were used to create one of the world's largest land sculptures.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

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

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

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

An 18th-century lighthouse built on a 16th-century castle is now a monument to the maritime beacons of Scotland.

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

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

Where the sleeping monsters of Scotland's oil industry are left to rust.

A stately palace has been converted into the world's largest cannabis museum.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

This semi-secret storybook hedge maze is also the oldest garden in the city.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Cold war icon and onetime "hole" in the iron curtain.