The Columbia Road Flower Market is now open every Sunday, rain or shine.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

This 1920s Dutch barge is now a floating bookstore.

A tongue-in-cheek arcade where the games are based on everyday life.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

This former insane asylum now holds a pathological anatomy museum.

Macabre museum devoted to historical Viennese murders.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The beautiful baroque library of the Hapsburg empire.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

An important Mayan religious and trading center dating back to 200 BC.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

This isthmus in the Bahamas narrowly separates the roiling Atlantic from the cool Bight of Eleuthera.

An underwater road considered a possible Atlantis location.

They squeal, they nosh, they look like predators.

In paradise, feral pigs have claimed an island all to themselves.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.