Experiences at Kirkilai and the Karst Lakes
Hiking and walking – explore the trails around the lakes, see small sinkholes and karst formations.
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Biržai Three-Site Tour – Nature, History, and Mysteries
Biržai is a unique region of Lithuania where stunning nature, ancient architecture, and mysterious legends come together. In this tour, we will visit three main attractions: the Kirkilai Observation Tower and Karst Lakes, Karvės Cave, and Biržai Castle.
Kirkilai Observation Tower and Karst Lak

Biržai Three-Site Tour – Nature, History, and Mysteries
Biržai is a unique region of Lithuania where stunning nature, ancient architecture, and myster

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Unnamed tour

Biržai Kirkilai Tower

Hiking and walking – trails leading to the tower pass through forests and meadows, perfect for observing plants, birds, and wil

Biržai Kirkilai Tower
The Biržai Kirkilai Tower is a unique wooden observation structure located in northern Lithuania, in the Biržai district. The tower stands on a high hill, providing breathtaking panoramic views of the surrounding fields, meadows, forests, and the famous karst lakes. It is designed for both tourists and nature enthusiasts, offe

Biržai Kirkilai Tower
The Biržai Kirkilai Tower is a unique wooden observation structure located in northern Lithuania, in the Biržai district. The to

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Kirkilai Lakes and Observation Tower

1. Exploration and hiking

Nearby trails and forests are perfect for walking and observing nature.

The cave itself can be viewed from the edge, creat

What is it?
Cow’s Cave (Lithuanian: Karvės ola) is a remarkable karst sinkhole located near the village of Karajimiškis in the Biržai district, about 3 km west of the town of Biržai. It is considered a geological natural monument – a striking site where you can visibly observe karst processes at work.
Dimensions and shape

The hole is nearly circul

What is it?
Cow’s Cave (Lithuanian: Karvės ola) is a remarkable karst sinkhole located near the village of Karajimiškis in the Biržai district, about 

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Cow Cave


1. Castle and museum tours

Guided tours: learn about the Radziwiłł family, castle construction, defensive systems, and life in the 17th–18th centuri

Biržai Castle — located in the northern Lithuanian town of Biržai, on the southern shore of Lake Širvėna, the castle is a remarkably preserved example of a bastion‑type fortress.
Historical Background

Construction of the fortress began in the late 16th century (1586 – 1589) following the Italian bastion plan.
Creation of the artificial Lake Širvėn

Biržai Castle — located in the northern Lithuanian town of Biržai, on the southern shore of Lake Širvėna, the castle is a remarkably preserved example

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Experience with
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Objects (3)

Unnamed tour

Experience withtext & audio

Tour description:

Physical activity:

Complexity:

Activity description:

Objects (3)

Experience with
text & audio