A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

A shining, cold, black organ lies in San Francisco's financial district.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

Formerly a brutal Nazi colony, this Chilean village was remade as a (controversial) German-themed tourist trap.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

An exclusive waiting room built for the royal family in the 1920s is hidden in Milan’s central station.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

Fantastic views and thousands of love locks.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

100 year tradition of fist fights, marked by marble footsteps.

Elvis's own personal tropical hideaway.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

A chapel built by Italian POWs during World War II tells a forgotten tale of the war on the home front.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.