Diego Rivera's massive tiled fountain and failed infrastructure project.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

Electrical curiosity museum housed in an old transformer station.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This colorfully-painted tunnel links two distinct parts of a historic neighborhood.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

An unsettling sculpture of a boy hanging out in a street in Ghent has been baffling visitors for years.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

A Museum of Psychiatry in a still-operating mental institution.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Belgium’s famous peeing statue has worn many hats (and coats, and pants), which are on display at this small museum.

A huge old mansion full of thousands of toys, each there to be used and played with.

When you're a great Russian Tsar, even your vomit gets a statue.

A little sculpture with a large wardrobe.

Meet the bronze beloved pet to a family of famous peeing statues.

Cozy basement bar sports an inventory of over 2,000 beers.

Lavish royal estate punctuated with heated greenhouses.

A vintage video game wonderland in downtown Reykjavik.

This Viking-inspired miniature golf course features a pirate ship and views of Icelandic landscapes.

This aromatherapy shop and mini-museum cofounded by the Sigur Rós frontman documents Icelandic history through scents.