Model Trains and Much More in Hamburg.

This red light district plaza memorializes the Fab Four and their historic connection to the area.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Hamburgers are intensely proud of their tunnel beneath the river.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A rare chance to ride one of the few continuous elevators still in operation.

A beautifully rebuilt windmill from the 17th century, situated along the Amstel River.

The medieval fortress of Prince Lazar of Serbia is now an archaeological park.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

A mocking tribute to the past and modern leadership of Prague.

A historic and beautiful Art Nouveau chamber in a historic railway station.

The first museum in the world devoted to sexual gadgetry.

Memorial to the 89 children killed during the NATO bombing of Serbia.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A museum dedicated to the former country.

Saint Borromeo often prayed in this austere crypt during the 16th century.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

Curious carved stones and bird-like wings are a symbol of Serbian resilience and freedom on the site of a WWII massacre.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

Structure built from the skulls of vanquished foes.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

A purr-fectly spirited bronze celebration of local street felines through history.

Blending modern art with Baroque architecture, this wondrous mosaic grotto serves as the late artist's final creation.

This Volcano-like rest area was designed by architect Giulio Ceppi built according to energy efficiency and ecological footprint standards.