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

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

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

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

"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.

This 15th-century church houses priceless works of art from a range of Croatian artists.

Inside this mansion turned museum, the works of prominent Croatian artists are on full display.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

Humble beginnings for one of the world's most famous scientists.

Gargoyle head that brings good luck.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

An ancient knight and a symbol of the city's freedom.

A spectacular cave and a beguiling lake.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

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

Protecting the dead from opportunistic body snatchers.

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

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

Largest lake in Great Britain measured by surface area.

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

The oldest library in Scotland was built from the remains of a church to hold a churchman's library.

A giant pineapple, a symbol of hospitality, and an amazing vacation rental option.

The vast, legendary catacombs hold secrets much stranger than stacked bones.