This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

The Mexican painter Diego Rivera created this unusual museum to display his collection of pre-Hispanic artifacts.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

At a museum of everyday objects, it is the act of collecting that is really on display.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

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

The famous artist couple lived and worked here, in two different houses separated by a bridge.

66,000 pieces of art, donated by one of the world's richest men.

Nimrod Polar Expedition base, and home to hundred-year-old frozen whisky.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

A bright little alley in La Boca is a part of tango history.

A tower devoted to — and modeled after — the Divine Comedy.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Sloth rehabilitation center in the jungle of Costa Rica.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

Handsomely crafted representations of our round planet.

A Kyiv-based repository for all manners of discarded curiosities.

The Virginia home of one of the signers of the Declaration of Independence is being preserved with a unique glass facade.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

This giant mural of Santa Muerte in downtown São Paulo reminds passersby of their own mortality.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

A homemade anatomical collection of medical anomalies and accidental catastrophes.

This hulking behemoth is actually five interconnected towers built in the 1960s.