This small chapel holds the mummified heart of one of the heroes of the Greek Revolution.

Scars of this building's past life as a violent prison still cover its walls.

This striking sculpture of Icarus honors Greece's fallen flyers.

This graffitied 19th-century building was a prototype of European industrial architecture.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

This popular cave pool is truly magical, despite the crowds.

Found down a long dirt road, a sacred Mexican cenote and 18th-century hacienda remain hidden.

This one-of-a-kind convent boasts a kaleidoscopic exterior of stars and double-headed eagles.

Neal Cassady may still have an open tab at one of Denver’s oldest watering holes.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

An ode to one of the first concerts broadcast via satellite.

A unique set of caves that spits waves back out into the ocean.

A ghost town that held steady longer than most, but finally gave up the ghost.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

A house carved into a rock in the 1940s.

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

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

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

A small oasis not far from downtown Moab.

A famous flea market artist's studio that's full of odds and ends.

A natural formation that resembles a camel resting in the New Mexico desert.

A serene garden path lined with 36 haiku stamped into clay stones.

Life-sized sculpture of a blue whale made of hand-recycled plastic trash.