This once-derelict building is now one of the most beautiful bookstores in the world.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Romania's triumphal arch looks out over Bucharest.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

The largest greenhouse in the world is home to over one million types of plants.

This ruined 15th-century hermitage is steeped in myth and mystery.

This mountain is one of the largest in Scotland but is better known for its hollow insides.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

This eclectic sanctuary is a hodgepodge of various architectural styles, all crammed into one building.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

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

A remarkable feat of Victorian engineering across the Firth of Forth.

This repurposed church offers a more literal way to get closer to the heavens.

This king penguin is a knighted brigadier of the Norwegian Army.

The remnants of a facade from a 19th-century market stall emporium.

This city square dates back to the Scottish Enlightenment and was home to some of Scotland's brightest minds.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

A miniature of a lighthouse acts as a beacon for what transpires inside this location.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.