These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The metal leaves on this tree are engraved with the names of Holocaust victims.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

Featuring a meatless buffet fit for kings, this family-owned Zurich eatery is considered the oldest vegetarian restaurant in the West.

This magnificent Art Deco church is a reflection of Lithuania’s turbulent history.

A memorial to the murdered Jews of Kaunas.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

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

Relics from an era long gone, sit idle outside this Estonian museum.

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

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A subterranean house of worship carved right out of the bedrock.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

Stockholm's tiniest statue is of a small boy looking at the Moon.

The world's first invisible city square is an homage to a man who pushed the boundaries of art.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

Thousands of miniature bronze sculptures have taken over this city square creating a unique art installation.

This floating sculpture of ice is a poignant reminder of nature's power.