A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

One of the world's most complete mineralogical collections.

The Tübingen University anatomical collection hosts an example of an extremely rare medical phenomenon.

This nonsensical smiling boat shuttles passengers between two places they could've easily walked between.

Stockholm's last remaining paternoster elevator.

These unusual paintings give thanks to the saints and deities who granted people favors and miracles.

Feast your eyes upon hundreds of Nepal's native butterflies and moths.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

This statue of the "father of television" stands prominently in the United States Capitol.

The wartime boat shelter now doubles as an underground concert hall where musicians play on rafts along the waterway.

A bike train runs along a disused railway line through the tranquil French countryside.

These Benedictine nuns have been making artisanal cheeses since before it was cool.

A network of hundreds of interconnected wineries in caves hides under the town center.

These four islands right offshore have waterfalls, colorful lights, fancy buildings, and a secret purpose.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

It's said to be one of the most significant collections of contemporary Chinese art in the world.

Giant telescope mirrors built in a spinning furnace under a college football stadium.

The humble field where the first Major League Baseball game was played.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

The secluded site of a 1943 plane crash and amazing rescue is only accessible by hiking through the woods.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

The largest brick bridge in the world.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.