A Soviet-era health spa complete with radioactive bathing and shock therapy.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

Exploring the wilder, more passionate sibling of Erg Chebbi feels like discovering a secret sun-kissed planet from another galaxy.

Among the best preserved megalithic monuments in the Aragón river valley.

A reservation-only highland forest reserve of endangered Pinsapar firs stands above a village in Andalucía.

Rare karst landscape eroded from a flat seabed.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

An arresting arch punched straight through a mountain provides one of the most scenic spots, and challenging climbs, on the planet.

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

Largest necropolis in the Mediterranean.