Medicinal spa created with the discharge from a geothermal energy plant.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

A high point in Vancouver kitsch.

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

The colorful, smiling concrete silos of Vancouver.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

A rare opportunity to drive across the ocean floor.

A small Canadian town founded as a refuge for Loyalists following American Independence.

The largest tidal whirlpool in the Western Hemisphere.

The 32nd president's sprawling cottage sits on an island enclave jointly managed by the U.S. and Canada.

A quarter mile off the coastal tip of Maine you'll find the "Beloved Island" of Franklin Delano Roosevelt.

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

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

One of the most unusual geological features, recognizable from a dozen hit movies.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Megachurch turned Catholic church comprised of 10,000 glass panes.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

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