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

Detroit’s downtown castle is one of the oldest structures in the city.

The world’s largest Masonic temple was saved by the White Stripes.

This hidden jockey “walk of fame” celebrates the winning riders of the Kentucky Derby.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

Elaborate series of tunnels where traces of mass suicide are still visible.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A subterranean house of worship carved right out of the bedrock.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

The Guardian of Tallinn.

Relics from an era long gone, sit idle outside this Estonian museum.

A forest park outside Tallinn full of architectural and artistic curiosities.

Spend your honeymoon where the Devil had his wedding.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

"There's nothing there," and other lies the KGB told us.

This quirky collection of furniture also happens to be a public art installation.

The remains of the vast manor that once belonged to Lord Kira, villain in the 47 Ronin story, is now a shrine dedicated to the incident.

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

Inspired by the famous sculptures on Easter Island, this head serves as a popular meeting spot by Shibuya Station.

Tragic reminders of the 1945 firebombing campaign over Tokyo still haunt this bridge.

A bovine sumo match in which both bulls live to fight another day.