Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

The smallest pub in Britain was once a cabinet of curiosities and it still has the dead cat to prove it.

The historic villages and towns of Suffolk are filled with wonky wooden beam houses painted an unusual shade of pink. Unknown to many though, this sweet shade has a bloody history.

This collection of historical artifacts and tropical wildlife waits just beneath the surface of the water.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

A 1950s beatnik coffee house, turned 60s counterculture hotspot, turned modern music venue.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

The Guardian of Tallinn.

The colonial city's social history is reflected in its fanciful door knockers.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

The only quarter of the Old City not dedicated to a major world religion.

Macabre astrological automaton clock dating to the late 1400s.

Elevated freight railway turned wildly successful urban park.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

Its 27 graveyards represent the many nationalities and ethnic groups that voyaged to this wilderness in the late 19th century.

The spur that wouldn’t die.