This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

You feel like you're in a forest, but you're actually walking amidst the branches and trunks of a single giant tree.

This singular art museum in São Paulo is unique inside and out.

A snake farm famous for its venemous varieties.

A jungle in the heart of São Paulo reminds visitors of what Brazil looked like untouched by man.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

Bizarrely-painted church designed by a controversial artist.

The world's most important buildings shrunk to a tiny size.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

A magnificent collection of imperial armor and weaponry.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

The shell of a medieval fortress offers commanding views of the area it once protected.

Ride a dragon train into a world of dwarves.

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

Double spiral staircases are not unheard of, but they are very rare.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Fantastic stories on a miniature railroad.