Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This modern monument to pagan belief looks like it was transported straight from ancient times.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Moss and stone turn this waterfall into an otherworldly liquid veil.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

The oldest bookstore in Iceland.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

A giant concrete orb in far north Iceland marks the ever-shifting boundary.

A sulfuric martian landscape that looks far better than it smells.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

A winding, blood-red tunnel of hardened lava navigable by foot.

Climb right into the heart of this colorful Iceland volcano.

Walk in the footsteps of the gods and straddle two tectonic plates.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

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

Rising from the sea like a stone monster.

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

Medicinal spa created with the discharge from a geothermal energy plant.

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