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

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

Ruins of a 10th century church tucked away deep in a botanical garden.

An acoustic anomaly with a mysterious cause.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A collection of grotesques lines the walls of this Italian villa.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

An architectural oddity of six stories, accessed by graceful ramps.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

These striking ruins of a castle resemble a ship's stern.

Religious dwelling in a Spanish volcano.

Wonderland replication in progress by one persistent man.

Village situated on a narrow volcanic escarpment.

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

Malaysia's floating mosque.

1800 rooms of single-family residence in Brunei.

A well kept and well documented look at the Bruneian Sultan's life and successes.

A symbol of Islam in oil-rich Brunei.

Ferdinand Magellan dubbed the world's largest water village the "Venice of the East."

The most disputed archipelago in the world.

Four distinctly unique gardens commemorate the POWs who lost their lives during the Sandakan Death Marches of 1945.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.