Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

A lion given to the prime minister somehow got stuffed and sent to Florida.

This public library and its impressive collection of academic books have not changed since the 17th century.

A unique hotel for the artistic soul.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

The beautiful baroque library of the Hapsburg empire.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Baroque celebration of the end of the Great Plague of Vienna.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Op-art architecture designed for happiness.

A spherical "micro-nation" in the heart of Vienna.

This South London cemetery holds the remains of more than 15,000 people.

This architectural beauty is the home to a personal collection of more than 600 examples of mechanical musical instruments.

The corpse bride of Portugal.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

Everyone and everything one man ever loved and lost, now stare into the East for all eternity.

This giant steer-skull edifice refuses to die.

Limestone caves with spectacular showcase chambers.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Giant telescope mirrors built in a spinning furnace under a college football stadium.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.