Intriguing Environs

Mysterious heaps of stones dot these otherworldly woods.

This lake’s emerald green waters are a spectacular sight, but it’s not a great place for a swim.

Hidden deep within a Filipino jungle is an incredible waterfall that plunges into a dazzling blue-green pool.

Ride a boat through this magnificent underground world, which now doubles as a theater.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

This Turkish cave boasts some rather bizarre associations with the King of Mount Olympus.

Surrounded by a smudge of dark earth, this isolated volcano sits in stark contrast to the surrounding Sahara.

Flames have been burning within this mountain for more than 2,500 years.

The largest salt lake in the Sahara is mysteriously alluring.

A remote sandstone plateau named for a legendary cattle rustler.

These abandoned salt flats are now a haven for wildlife.

You can walk up Thailand’s naturally non-slip waterfall.

Two creeks flow out of either end of this canyon in opposite directions.

The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

This dry lake bed contains the oldest known petroglyphs in North America.

This single-track road rewards brave drivers with stunning Scottish scenery.

This series of waterfalls tumble into a radiantly blue river.

Locals call this magical moss-covered walkway the "Emerald Path."