Said to be the only museum in the world dedicated to the most classic of all blooms, the rose.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

An abandoned saucer-shaped monument in the Bulgarian mountains.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A 18th century graveyard and its astonishing cortege of macabre iconography.

This mundane post marks the old location of the city's main postal hub.

A roadway designed for a visiting monarch.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

Neon artworks light up this dark Edinburgh tunnel.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.

Time-frozen department store of dangerous and dusty relics.

Believed to be the only Orthodox church in the world that features a free-standing pulpit.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The ruined doorway is a portal to the building's turbulent and torturous past.

An ancient octagonal weather station named for the eight Greek gods of wind.

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

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.

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

This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

Rumors of the occult haunt this upscale 1920s hotel.