One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Elevated freight railway turned wildly successful urban park.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

San Francisco's newly reopened hands-on science museum.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

France's third-largest necropolis offers a peaceful respite from a busy port city.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

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

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

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.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

The biggest museum dedicated to insects in North America, one of the largest in the world.