Hidden in magnificent rolling countryside, see what may be the largest modern stone circle in the world at Wisconsin's very own "Stonehenge”

This cave holds a surprisingly colorful variety of geological oddities.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

This creepy, abandoned cemetery is all that remains of a once booming mining town.

This cemetery is dedicated to the people who died fighting for democracy in South Korea.

A bizarre house filled with an astounding array of collections.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

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

Canada's largest graveyard boasts a lot of noteworthy artifacts as well as its own computerized mapping service.

The remains of a paranoid inventor's hidden workshop lie in beautiful ruins amidst a Canadian park.

This failed condo development was reborn as a street art hub.

An acoustic anomaly with a mysterious cause.

Less a museum than a bizarre fantasy world created by artists and engineers.

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

An arresting temple full of mosaics as colorful as the politician they memorialize.

A long-abandoned provincial prison left to crumble in the frigid air of Ontario.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

The ruins of a rehabilitation center for World War II vets can be found in the Westminster Ponds Conservation area.

Clusters of abandoned buildings hint at the facility's 144-year history with psychiatric health.

It took over 100 years to decode this enigmatic epitaph for two buried brides.

This inexpensive lodging house was once a prison notorious for its inhumane practices.

A school teacher's massive and terrifying self-built castle.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

This colorful creation wasn't always a welcome part of Toronto's Moccasin Trail Park.