Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

A Beaux-Arts triumph set to become Ford's innovation campus

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

A tall karst islet popularized by 007.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Tubing through a cave lit with glowworms is a magical underground experience.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

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

A museum now occupies the mansion in Samoa where the prolific Scottish writer chose to spend the last years of his life.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

A floating cat sanctuary on an Amsterdam canal.

The footprint of a frustrated devil in Munich's Cathedral.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

One part antique store, one part curiosities hodge-podge.

Fascinating town where normal life interfaces with the occult.

Famously misunderstood wonder of the ancient world