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

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

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

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Spend the night in this formerly abandoned traditional Scottish village.

This series of Scottish caves has no clear purpose other than baffling historians.

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

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

An eccentric aristocrat brought these Australian natives to their current Scottish home.

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

A former coastal watch post has been turned into a bothy with unrivaled views of the sea and its inhabitants.

Though difficult to access, this stunning cave has a place in Scotland's poetic history.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

Caves famous for the dragon-slaying saint who lived there.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The beautiful baroque library of the Hapsburg empire.

The final resting place for the remains of 143 Habsburg royalty.

A lone lighthouse on the wind-swept shores of the cape.

This lighthouse sits within a glacial valley.

Newfoundland's last remaining granite lighthouse.

The stone barriers in this historic fishing village were once used for farming and gardening.

This underground power plant looks more like a super-villian's lair than a public work.

The last remains of the extinct Beothuk people native to the island of Newfoundland.

This rocky spread has been squeezed up directly from the bowels of the earth.