This covert museum showcases booties worn by a rescue dog and slippers owned by Queen Elizabeth II.

A grand entrance to one of the world's smallest Chinatowns.

This warehouse-gallery-shop hybrid showcases Mexican craftwork at its best.

This ancient jade mask depicting the Zapotec bat god was found in the ruins of the pyramids of Monte Alban.

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Part bookstore, part café, and part forest.

Romania's triumphal arch looks out over Bucharest.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

Deep in the Guatemalan jungle stands an ancient pyramid that once marked the reign of a king.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

Sofia's legislative center is continuously reinventing itself.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This once-derelict building is now one of the most beautiful bookstores in the world.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

A decaying, yet still functioning, work of communist architecture.