A subtle memorial marks where a human chain protested Soviet control in 1989.

The European Union’s tallest freestanding structure provides radio and television broadcasting to half of Latvia.

This Moorish fortress has guarded Málaga from the slopes of Gibralfaro hill for nearly a thousand years.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

Come for the speed, leave in love with the desert.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

Spectacular views await visitors to this lake.

These giant metal horses graze on a hilltop near the Montana highway.

The only road through the heart of Glacier National Park.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

This roadside stop between Goblin Valley and the Henry Mountains is the perfect location to view some of the region's natural wonders.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

A tunnel with windows, so you don't miss out on the impressive views.

The fifth-longest natural arch in the world, and the longest outside China.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This small hill features the most notable collection of petroglyphs in Saguaro National Park.

A motel dedicated to Southwestern nostalgia.

See massive fossils that are over 200 million years old in northeastern Arizona.

These megalithic tombs contain some of the largest stones ever moved in prehistory.

A tiny village church in dramatic surroundings.

The gardens and chambers of this Moorish citadel conjure memories of the Alhambra.