Ancient mysterious ruts carved in the bedrock.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This subterranean necropolis holds three floors of antler-dug grave caves.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

Home to three historic ships from the age of Vikings.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

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

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

Traditional 15th century Chinese garden in the middle of Vancouver.

This expansive bridge in the Canadian wilderness was originally just built for friends.

Two thirds of this Montreal neon icon has survived to flash another day.

A massive Montreal stadium that has seen nothing but trouble since its inception.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.