Where Venice's gondolas go for a tune-up.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

This massive and unusual rock formation near Okotoks is the world's largest known glacial erratic.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

The remains of what was, not so long ago, the world's largest city.

The world's second-largest sundial, made entirely out of stone.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

A startling, centuries-old subterranean marvel hides in plain sight.

A deeply beautiful 15th-century stepwell with a tragic story.

Legend has it a commoner volunteered to be buried alive in the foundation so that the great fortress could be built.

This restaurant is proud to be built atop a burial ground.

World's most expensive home.

A blooming house of worship for the masses.

An extraordinary "City of Caves" carved from solid stone.

This experimental utopian "city of the future" in rural India may hold a dark secret.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This ancient city - home to nine civilizations - is soon to be buried under 200 feet of water.