This beautifully deceptive waterfall is something far different from what it appears to be.

A museum in the former home of Marxist revolutionary Leon Trotsky.

Frida Kahlo's childhood home, now a museum of her life and works.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

Despite the name, the waters of this Canadian lake are actually blue-green in color.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

The commemorative stone column conceals a secret laboratory.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Historic site where Native American hunters once trapped and killed buffalo.

Hundreds of enormous icebergs drift through this waterway every year.

Colorful lights and mirror-like brine pools create trippy illusions within the historic mine.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

Beneath the most controversial monument in Mexico City is a cultural center that exhibits only digital art.

The only castle in North America to ever house European sovereigns.

Where layer cakes tower above one’s head and there is never a shortage of icing.

This oddly named town refuses to change its phallic moniker.

An ancient Viking village in North America that predates Columbus by 500 years.

An old drug store full of mortars and pestles, pill-making machines, and medicines reputed to cure most any illness.

Where a young athlete began his run across Canada after losing his right leg to cancer.

The first transatlantic wireless signal was received at this 17th-century fort.

A World War II gun battery sits at the easternmost point of North America.