"UNESCO bay, Mediterranean breeze"
World Famous
Ha Long Bay
Vietnam
Thousands of limestone karsts and islands rising from emerald waters. UNESCO World Heritage and one of the world's most recognizable seascapes.
European Alternative
Bay of Kotor
Montenegro
A dramatic fjord-like bay surrounded by towering mountains and medieval walled towns. Cruise between ancient villages, hike fortress walls, and swim in crystal waters.
The True Cost
Average prices from London
World
Ha Long Bay
flight
Europe
Bay of Kotor
train
€554
True price saved
True price reflects hidden social and ecological costs such as CO₂ and air pollution.
1.7t
Less CO₂
97%
Emission reduction
Prices are market averages, not lowest fares. Hidden costs based on CE Delft external-cost factors.
Ready to go?
Estimates from London, adjusted for current fuel prices
Ha Long Bay
by flight · 9,329km
Bay of Kotor
by train · 1,746km
from €225
Search trains & buses →via Omio
Save 1.7t CO₂ vs flying
Or travel further on one pass
Interrail Pass from €283 youth / €369 adult
Ha Long Bay
Bay of Kotor
Why These Two?
Both are UNESCO-listed bays with dramatic karst/mountain formations rising from calm waters, best explored by boat.
Travelling to Ha Long Bay
By flight · 9,200 km
CO₂: 1,711 kg
Travelling to Bay of Kotor
By train · 1,600 km
CO₂: 45 kg(97% less)
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Photo · Ha Long Bay by Unsplash · Bay of Kotor by Wikipedia