Lost subway station nestled beneath Toronto's busy commuter line.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

A wunderkammer of mysterious objects and stories.

Art and a pun, all in one.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Ruins of a German Castle on top of a towering stone pillar.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

An eerie, derelict amusement park in Berlin.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

This "mathematical tower" was an observatory, early skyscraper, and place to reflect on all of nature and the cosmos.

A pyramid in Central Europe of unknown origin.

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

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

The amazing wonder cabinets of a very rich Austrian archbishop.

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

Ride a dragon train into a world of dwarves.

Visitors dip into a variety of pools of what was once ice.

Dine amidst exotic plants at this former royal greenhouse.