This one-time health resort was used by aristocrats around the world.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

This eclectic architectural gem played witness to Zurich’s colonial past.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

The first museum in the world devoted to sexual gadgetry.

Macabre astrological automaton clock dating to the late 1400s.

The Brutalist building harbors an unusual inverted dome that swoops down over its central sacred room.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This ancient burial mound is accessed by an impressive Greek-built archway.

Gargantuan home of Russian science.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

This 15th-century cave complex is one of the very few monasteries to stay open throughout World War II and the Soviet regime.

A hidden three-foot-wide house separates these two regal churches.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

The oldest housing complex in Riga is a mini timeline of architectural trends.

A WWII museum that tries to reenact history.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

What almost started out as a spite house became an eccentric's found object masterpiece.

Open-air museum with a large collection of Soviet-era statues.

This micro-nation may be some sort of prank, but its constitution sure seems official.