This fantastical waterfall is hidden in a cave located in a cracked cliff.

Staves, storm-calling, and of course, necropants.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

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

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

This museum dedicated to divination also honors a local 10th-century prophetess.

Two volcanic lakes in an enormous crater formed in a prehistoric eruption.

This elegant arc of a waterfall marks a religious turning point.

Surrounded by ash fields in Iceland, an impossibly verdant valley looks like something out of a fairytale.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

A little-visited waterfall in an otherworldly landscape.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Beauty and history abound in this remote West Texas canyon.

A registered historic landmark shrouded in unsettling local legends.

Artist James Turrell's ode to dawn and dusk on the campus of Rice University.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

A view-altering observatory at the University of Texas.

The summer home of the largest colony of bats in the world.

Free public park and gardens filled with peacocks and peahens.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Mysterious glowing orbs float through the desert night.

The Grand Canyon of Texas.

A popular swimming hole that hides one of America's most deadly diving spots.