These wondrously illuminated caverns extend under the mountains of the Fukushima Prefecture.

These Japanese ruins have been brought back to life with elaborately recreated buildings.

The tallest bronze seated statue of the Buddha in Japan.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

This massive boulder was hurled into a Zurich church when a gunpowder depot was struck by lightning in 1652.

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.

These waste baskets play a few risque messages to discourage littering.

At this bohemian accommodation, guests who dream of joining the circus can spend the night in themed wagons.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

This chimerical bridge/tunnel appears to dead end right into the sea.

This collection of 80 polarizing foods aims to challenge your subjective notions of repulsion.

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

A massive tribute to Estonian history and culture.

Take a seat and hear a song by the composer Frédéric Chopin.

The oldest continuously operating pharmacy in Europe.

A forest park outside Tallinn full of architectural and artistic curiosities.

A black cat protests the City Guild in Riga's Old Town.

A preserved oak tree about 3,500 years old found in Riga, Latvia.

The largest coin pyramid in the world is a carefully balanced stack of over 1,000,000 pieces.

Things aren't quite what they seem at this mind-bending museum.

The site of one of the largest prison escapes of World War II.