The secret room where early Bolsheviks cranked out propaganda fliers on a smuggled printing press.

The building's fluid, wavelike walls are a true feat of architectural ingenuity.

Mysterious hillside with a continuously burning natural fire.

A shrine of fire worship built on top of a natural flame.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

A massive collection of petroglyphs dating back some 40,000 years.

Resonant stone, that has been played since prehistoric times.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

A gigantic collection of teeny, tiny books.

A unique museum dedicated to culture and artistry of carpet weaving.

Iconic pyramid from famed British architect Norman Foster designed to represent all of the world's religious faiths.

A Stalinist prison camp for the wives and children of men accused of betraying the Soviet state is now a memorial museum.

A modern tower, symbolizing the legend of a golden egg on top of the tree of life.

An entertainment center in a huge transparent tent.

A sober museum housed in the original administrative building of one of Stalin's largest gulags.

This Soviet-era athletic and recreation facility is the highest ice skating rink in the world.

Visit the monolithic tomb of America's most famous general.

One of the only single-person private gravesites in New York City.

Play heads or tails with thousands of different coins.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

Rummage through this sunken ship, but leave your scuba gear at home.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.