Stunning views over Ontario's old-growth pine forests.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

Fast food feels like fine dining at this award-winning modern Georgian building.

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

The ornate structure is part of a building boasting more marble than the Vatican.

Curious onlookers have suspected this strange structure is a secret government base.

The world’s largest Masonic temple was saved by the White Stripes.

This shallow cave got its name from copious amount of human bones found inside.

Strange physical sensations and optical contradictions keep visitors coming back for more.

Astounding collection of coin-operated games and automata.

This freshwater spring fills with 10,000 gallons of water per minute.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

These old World War II fortifications have been transformed into an unusual equine attraction.

A lake in the middle of the tundra of Quebec is said to be the purest freshwater lake on Earth.

Iconic rock formations that allow for exploration during high or low tide.

The collection of signage remembers the midcentury pushback against the new neon light.

The world's largest dark sky preserve is a Canadian park established to preserve the country's last wood bison.

Earth's greatest purely vertical drop at 4,101 feet.

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

Louise Bourgeois' 30-foot-tall steel spider sculpture.

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

A renegade art installation in a small Vancouver park is now officially sanctioned by the City Parks Department.