Model Trains and Much More in Hamburg.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Hamburgers are intensely proud of their tunnel beneath the river.

A giant "X" symbolizes the blood spilled from the brutal Juárez drug wars.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Renowned restaurant tucked in a cave once occupied by buccaneers.

This former sugarcane transport tunnel is now a portal to a lovely beach.

The world's second largest single-dish radio telescope, once used to contact E.T.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

A 400-square foot model of historic Quebec is the playing field for a state of the art light and sound show.

A contemporary fresco movement illustrates the region's rich history.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

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

A historic Montreal market that was the city's agricultural hub for over century.

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

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

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

The private island of Yale's elite Skull & Bones society is kind of a dump.

The purported world's shortest international bridge connects a homeowner in Canada to his backyard in New York.

This tiny little island has, as the name says, just enough room for its single house.

A castle built for love, and abandoned due to heartbreak.

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