One of the largest underground systems runs under Canada's largest urban center.

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.

The Incredible Hulk, Yoda, Mulder and Scully, and many many others watch over the mean streets of Toronto.

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

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Fortified medieval tower house with lovely roof garden.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

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

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Op-art architecture designed for happiness.

The topiary maze at the Habsburg hunting lodge.

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

This gem-encrusted temple is said to contain some of the Buddha's hair which can make the deaf hear and the blind see.

The oldest teak bridge in the world is made from the remains of a royal palace.

This golden temple is surrounded by hundreds of stone tablets that comprise the "world's largest book."

A grand example of 19th century Burmese teak architecture, and the most significant of Mandalay's historic buildings.

Over 2,000 ancient temples dot the Myanmar landscape at the site of this famed archaeological site.

Myanmar's Mount Olympus atop a 2,500-foot volcanic plug.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

The first green space constructed on an elevated viaduct.

The celebrated eyesore created by starry-eyed sweethearts.