Places rog18 Wants to Go

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

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

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

Site of the first pathological and bacteriological research facility in the United States.

An Australian lake whose pink hue defies scientific explanation.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The innovative Nigerian floating school that may just be a glimpse into the future of design in a world of troubling climate changes.

Thanks to the building of a life-giving reservoir, part of the Great Wall of China is now a dive site.

Planes, trains, and automobiles have all been sunk as attractions at this Illinois diving spot.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

A massive concentration of algae is responsible for this lake's pink hue.

The saltiest lake in all of Crimea is also the pinkest of the pink and teeming with life.

A magically clear, blue river that seems to spring from nowhere.

This striking, two-toned confluence of rivers is visible from space.

This pair of Australian "waterfalls" appear to be falling straight across the land.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

An isolated dive site teeming with cnidarians.

A terrific purveyor of natural history objects and curios.