A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

A semi-scholarly approach to sex.

This Russian bar-restaurant lies within a three-story underground bathhouse.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

The oldest Methodist church in the United States has been spreading the good news for over two centuries.

More gold than anywhere else, ever.

This fairytale-like structure is the last turf church ever constructed in Iceland.

This extraordinary geological oddity resembles human-made pavement.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The 7,000-year-old calcium carbonate formation creates a magnificent natural bridge.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

One of the American Southwest's most extensive collections of Navajo rock art.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

This towering volcanic plug stands out among the dramatic formations that dot this otherworldly desert valley.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Dakota legend claims this locally iconic pinnacle was once part of a sacred burial site that was cleaved in two.

This massive roadside mascot was the first version of the giant to illustrate his butt.

This water tower has been a staple of the Rochester skyline since 1931.

A jaw-dropping brutalist space church seems to have crash-landed in the middle of America.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.