The final resting place of infamous outlaw Clyde and Marvin Barrow.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Two adjoining collections of 19th-20th century physics apparatuses and instruments.

Its columns were all carved from the same white oak tree.

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

Thanks to its curved shape, this incredibly durable dam "whispers" to visitors.

A fake block of cheese remembers a feat of dairy engineering from the Chicago World's Fair.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

The juke joint where legendary soul artists ate, drank, and made merry.

The "Jade Museum" is full of thousands of intricately carved works of art made from various precious stones.

Home to drunken tower-climbing goats... seriously.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

A Memphis park where you can walk the whole Mississippi River in one go.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

A park full of outsider art, created by college students studying outsider art.

The only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.

This might just be the TARDIS of bookstores.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.